262 lines
9.4 KiB
Go
262 lines
9.4 KiB
Go
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package main
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// holidays.go 给 AI 任务拆解提供「本月 + 未来几个月」节假日公历对照。
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// 农历节日每年换算不同，法定放假以国务院已公布年份为准；未公布年份只给节日当天。
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import (
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"fmt"
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"sort"
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"strings"
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"time"
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)
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type holidayItem struct {
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day time.Time
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offStart time.Time // 放假开始；零值表示仅节日当天
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offEnd time.Time // 放假结束（含）
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work []time.Time
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zh, en string
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aka string
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}
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// upcomingHolidays 从本月 1 日到未来 months 个月月末（默认 6）的节日，按日期排序。
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func upcomingHolidays(now time.Time, months int) []holidayItem {
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if months <= 0 {
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months = 6
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}
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loc := now.Location()
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start := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, loc)
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end := start.AddDate(0, months+1, 0) // 不含：覆盖「未来几个月」整月
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var out []holidayItem
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for y := start.Year(); y <= end.Year(); y++ {
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for _, h := range yearHolidays(y, loc) {
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if !h.day.Before(start) && h.day.Before(end) {
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out = append(out, h)
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}
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}
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}
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sort.Slice(out, func(i, j int) bool { return out[i].day.Before(out[j].day) })
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return out
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}
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func formatHolidayBlock(now time.Time, en bool) string {
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list := upcomingHolidays(now, 6)
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if len(list) == 0 {
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return ""
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}
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var b strings.Builder
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if en {
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b.WriteString("Holidays this month and the next 6 months (use these exact dates; do not guess):\n")
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} else {
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b.WriteString("本月及未来 6 个月节假日对照（必须用表中公历，禁止自己换算农历）：\n")
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}
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for _, h := range list {
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name := h.zh
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if en {
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name = h.en
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if h.aka != "" {
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name += " / " + h.aka
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} else if h.zh != "" {
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name += " / " + h.zh
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}
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} else if h.aka != "" {
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name += " / " + h.aka
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}
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line := fmt.Sprintf("- %s：%s", name, h.day.Format("2006-01-02"))
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if !h.offStart.IsZero() && !h.offEnd.IsZero() {
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line += fmt.Sprintf("（放假 %s～%s", h.offStart.Format("2006-01-02"), h.offEnd.Format("2006-01-02"))
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if len(h.work) > 0 {
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ws := make([]string, len(h.work))
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for i, w := range h.work {
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ws[i] = w.Format("2006-01-02")
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}
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line += "；调休上班 " + strings.Join(ws, "、")
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}
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line += "）"
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}
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b.WriteString(line + "\n")
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}
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if en {
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b.WriteString("Phrases: “before X” → day before the festival; “during X” → official holiday span if listed, else the festival day; “after X” → day after the holiday ends.\n")
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} else {
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b.WriteString("说法对照：「X前 / X之前」= 节日前一天；「X期间 / X放假」= 表中放假区间（没有区间就用当天）；「X后 / X之后」= 假期结束后一天。国庆可说十一，春节可说过年，元旦可说新年（公历）。\n")
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}
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return b.String()
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}
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func yearHolidays(year int, loc *time.Location) []holidayItem {
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d := func(m, day int) time.Time {
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return time.Date(year, time.Month(m), day, 0, 0, 0, 0, loc)
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}
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items := []holidayItem{
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{day: d(1, 1), zh: "元旦", en: "New Year's Day", aka: "新年"},
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{day: d(2, 14), zh: "情人节", en: "Valentine's Day"},
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{day: d(3, 8), zh: "妇女节", en: "Women's Day"},
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{day: d(3, 12), zh: "植树节", en: "Arbor Day (CN)"},
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{day: d(4, 1), zh: "愚人节", en: "April Fools' Day"},
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{day: d(5, 1), zh: "劳动节", en: "Labor Day", aka: "五一"},
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{day: d(5, 4), zh: "青年节", en: "Youth Day"},
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{day: nthWeekday(year, time.May, time.Sunday, 2, loc), zh: "母亲节", en: "Mother's Day"},
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{day: d(6, 1), zh: "儿童节", en: "Children's Day"},
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{day: nthWeekday(year, time.June, time.Sunday, 3, loc), zh: "父亲节", en: "Father's Day"},
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{day: d(7, 1), zh: "建党节", en: "CPC Founding Day"},
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{day: d(8, 1), zh: "建军节", en: "PLA Day"},
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{day: d(9, 10), zh: "教师节", en: "Teachers' Day"},
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{day: d(10, 1), zh: "国庆节", en: "National Day", aka: "十一、国庆黄金周"},
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{day: d(10, 24), zh: "程序员节", en: "Programmer's Day"},
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{day: d(10, 31), zh: "万圣节", en: "Halloween"},
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{day: nthWeekday(year, time.November, time.Thursday, 4, loc), zh: "感恩节", en: "Thanksgiving"},
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{day: d(11, 11), zh: "双十一", en: "Singles' Day", aka: "光棍节"},
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{day: d(12, 12), zh: "双十二", en: "Double 12"},
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{day: d(12, 24), zh: "平安夜", en: "Christmas Eve"},
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{day: d(12, 25), zh: "圣诞节", en: "Christmas"},
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}
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// 黑色星期五 = 感恩节次日
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for i := range items {
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if items[i].zh == "感恩节" {
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bf := items[i].day.AddDate(0, 0, 1)
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items = append(items, holidayItem{day: bf, zh: "黑色星期五", en: "Black Friday"})
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break
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}
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}
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items = append(items, lunarHolidays(year, loc)...)
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items = append(items, solarTermHolidays(year, loc)...)
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applyOfficialOff(year, loc, items)
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return items
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}
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func nthWeekday(year int, month time.Month, wd time.Weekday, n int, loc *time.Location) time.Time {
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d := time.Date(year, month, 1, 0, 0, 0, 0, loc)
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delta := int(wd - d.Weekday())
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if delta < 0 {
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delta += 7
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}
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return d.AddDate(0, 0, delta+7*(n-1))
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}
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// lunarHolidays 农历节日的公历对照（2025–2029）。春节 day=正月初一。
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func lunarHolidays(year int, loc *time.Location) []holidayItem {
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type row struct{ m, d int }
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// key → 公历月日
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table := map[int]map[string]row{
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2025: {
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"除夕": {1, 28}, "春节": {1, 29}, "元宵": {2, 12}, "端午": {5, 31},
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"七夕": {8, 29}, "中元": {9, 6}, "中秋": {10, 6}, "重阳": {10, 29},
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},
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2026: {
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"除夕": {2, 16}, "春节": {2, 17}, "元宵": {3, 3}, "端午": {6, 19},
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"七夕": {8, 19}, "中元": {8, 27}, "中秋": {9, 25}, "重阳": {10, 18},
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},
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2027: {
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"除夕": {2, 5}, "春节": {2, 6}, "元宵": {2, 20}, "端午": {6, 9},
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"七夕": {8, 8}, "中元": {8, 16}, "中秋": {9, 15}, "重阳": {10, 8},
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},
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2028: {
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"除夕": {1, 25}, "春节": {1, 26}, "元宵": {2, 9}, "端午": {5, 28},
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"七夕": {8, 26}, "中元": {9, 3}, "中秋": {10, 3}, "重阳": {10, 26},
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},
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2029: {
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"除夕": {2, 12}, "春节": {2, 13}, "元宵": {2, 27}, "端午": {6, 16},
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"七夕": {8, 16}, "中元": {8, 24}, "中秋": {9, 22}, "重阳": {10, 16},
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},
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}
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names := map[string][2]string{
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"除夕": {"除夕", "Lunar New Year's Eve"},
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"春节": {"春节", "Spring Festival"},
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"元宵": {"元宵节", "Lantern Festival"},
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"端午": {"端午节", "Dragon Boat Festival"},
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"七夕": {"七夕", "Qixi Festival"},
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"中元": {"中元节", "Ghost Festival"},
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"中秋": {"中秋节", "Mid-Autumn Festival"},
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"重阳": {"重阳节", "Double Ninth Festival"},
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}
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aka := map[string]string{
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"春节": "过年、农历新年、正月初一",
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"端午": "端阳",
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"中秋": "八月十五",
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"除夕": "年三十",
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}
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m, ok := table[year]
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if !ok {
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return nil
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}
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var out []holidayItem
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for k, r := range m {
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n := names[k]
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out = append(out, holidayItem{
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day: time.Date(year, time.Month(r.m), r.d, 0, 0, 0, 0, loc),
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zh: n[0], en: n[1], aka: aka[k],
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})
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}
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return out
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}
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// solarTermHolidays 常用节气（用户会当日期说）。
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func solarTermHolidays(year int, loc *time.Location) []holidayItem {
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type row struct {
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m, d int
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zh, en string
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}
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table := map[int][]row{
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2025: {{2, 3, "立春", "Start of Spring"}, {4, 4, "清明", "Qingming"}, {6, 21, "夏至", "Summer Solstice"}, {12, 21, "冬至", "Winter Solstice"}},
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2026: {{2, 4, "立春", "Start of Spring"}, {4, 5, "清明", "Qingming"}, {6, 21, "夏至", "Summer Solstice"}, {12, 22, "冬至", "Winter Solstice"}},
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2027: {{2, 4, "立春", "Start of Spring"}, {4, 5, "清明", "Qingming"}, {6, 21, "夏至", "Summer Solstice"}, {12, 22, "冬至", "Winter Solstice"}},
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2028: {{2, 4, "立春", "Start of Spring"}, {4, 4, "清明", "Qingming"}, {6, 21, "夏至", "Summer Solstice"}, {12, 21, "冬至", "Winter Solstice"}},
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2029: {{2, 3, "立春", "Start of Spring"}, {4, 4, "清明", "Qingming"}, {6, 21, "夏至", "Summer Solstice"}, {12, 22, "冬至", "Winter Solstice"}},
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}
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var out []holidayItem
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for _, r := range table[year] {
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aka := ""
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if r.zh == "清明" {
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aka = "清明节"
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}
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out = append(out, holidayItem{
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day: time.Date(year, time.Month(r.m), r.d, 0, 0, 0, 0, loc),
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zh: r.zh, en: r.en, aka: aka,
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})
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}
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return out
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}
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type offSpan struct {
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offStart [2]int // month, day（可能早于节日当天，如春节）
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offEnd [2]int
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work [][2]int
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}
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// applyOfficialOff 套上已公布的国务院放假调休（2026）。
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func applyOfficialOff(year int, loc *time.Location, items []holidayItem) {
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spans, ok := officialOff[year]
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if !ok {
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return
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}
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md := func(p [2]int) time.Time {
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return time.Date(year, time.Month(p[0]), p[1], 0, 0, 0, 0, loc)
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}
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for i := range items {
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sp, hit := spans[items[i].zh]
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if !hit {
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continue
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}
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items[i].offStart = md(sp.offStart)
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items[i].offEnd = md(sp.offEnd)
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for _, w := range sp.work {
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items[i].work = append(items[i].work, md(w))
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}
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}
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}
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// officialOff 国务院已公布年份。2026：国办发〔2025〕通知。
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var officialOff = map[int]map[string]offSpan{
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2026: {
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"元旦": {offStart: [2]int{1, 1}, offEnd: [2]int{1, 3}, work: [][2]int{{1, 4}}},
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"春节": {offStart: [2]int{2, 15}, offEnd: [2]int{2, 23}, work: [][2]int{{2, 14}, {2, 28}}},
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"清明": {offStart: [2]int{4, 4}, offEnd: [2]int{4, 6}},
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"清明节": {offStart: [2]int{4, 4}, offEnd: [2]int{4, 6}},
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"劳动节": {offStart: [2]int{5, 1}, offEnd: [2]int{5, 5}, work: [][2]int{{5, 9}}},
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"端午节": {offStart: [2]int{6, 19}, offEnd: [2]int{6, 21}},
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"中秋节": {offStart: [2]int{9, 25}, offEnd: [2]int{9, 27}},
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"国庆节": {offStart: [2]int{10, 1}, offEnd: [2]int{10, 7}, work: [][2]int{{9, 20}, {10, 10}}},
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},
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}
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