📅 日期时间Date & Time （第 3 页）(page 3)
日期时间计算器Date/Time Calculator
在某个日期时间上加减天 / 小时 / 分钟。本地处理。Add or subtract days, hours and minutes from a date-time. Processed locally.
支票日期大写Check Date in Chinese Words
按中国人民银行《支付结算办法》的票据填写规定，把出票日期写成中文大写（月为壹、贰、壹拾和日为壹至玖、壹拾、贰拾、叁拾时前加“零”，日为拾壹至拾玖时前加“壹”）。本地处理。Writes a cheque issue date in Chinese capital numerals following the People's Bank of China payment-settlement rules (a leading ling (zero) for months 1, 2 and 10 and for days 1–9, 10, 20 and 30; a leading yi (one) for days 11–19). Processed locally.
今天的日期（实时时钟、第几天、ISO 周）Today's Date (live clock, day of year, ISO week)
实时显示今天的日期和时间（本地时区）：多种日期格式、星期、今年第几天、ISO 周数、今年还剩几天和 Unix 时间戳。本地处理。Today's date and a live clock in your local time zone: several date formats, weekday, day of the year, ISO week number, days left in the year and the Unix timestamp. Processed locally.
交货周期与再订货点Lead Time & Reorder Point Calculator
两种模式：按下单日和收货日计算交货周期（日历日或工作日，跳过周六日），或按再订货点 = 日均需求 × 交货周期 + 安全库存计算何时补货。日期会严格校验（如 2026-02-30 无效）。本地处理。Two modes: lead time from the order and receive dates (calendar days or business days, skipping weekends), or the reorder point = daily demand × lead time + safety stock. Dates are validated strictly (2026-02-30 is rejected). Processed locally.
出生年份计算器（按年龄和是否已过生日）Birth Year Calculator (from Age and Birthday)
由当前年龄和今年是否已过生日算出生年份；不确定是否已过生日时给出两个可能的年份。参考年份默认是今年，也可以改成任意年份。本地处理。Find the birth year from a current age and whether the birthday has passed this year; if you are not sure, both possible years are given. The reference year defaults to this year and can be changed. Processed locally.
经过时间计算器（时:分:秒、跨午夜、扣休息）Elapsed Time Calculator (h:mm:ss, Overnight, Breaks)
输入开始和结束时间（24 小时制或 AM/PM，可带秒）算经过的时间，结束早于开始时按跨午夜处理，可扣除休息分钟数，同时给出小时小数和总分钟数，方便算工时。本地处理。Enter start and end times (24-hour or AM/PM, seconds optional) to get the elapsed time. An end before the start counts as overnight, break minutes can be subtracted, and the result is also shown in decimal hours and total minutes for timesheets. Processed locally.
今年还剩多少天（含工作日、周数、进度）Days Left in the Year (with Weekdays, Weeks, Progress)
从所选日期（留空为今天）到当年 12 月 31 日还剩多少天，可选是否把当天算进去；同时给出剩余周数、剩余工作日（周一至周五，不含节假日）、已过天数和全年进度百分比。本地处理。See how many days are left from a date (blank for today) to 31 December of that year, with or without counting that day, plus the weeks left, weekdays left (Monday to Friday, holidays not removed), days passed and the share of the year gone. Processed locally.
十二时辰对照换算Chinese Double-Hour (Shichen) Converter
把现代时间换算成中国古代十二时辰：子丑寅卯等时辰、初正与几刻（如「午时三刻」）、夜间几更、对应生肖和古称，并附完整的十二时辰对照表。Convert clock time to the traditional Chinese double-hours (shichen): the earthly branch, the 初/正 half and quarter (e.g.
翻页时钟（全屏桌面时钟）Flip Clock (Full-screen Desk Clock)
复古翻页效果的大字体网页时钟，支持 24/12 小时制、显示秒和日期星期，四种主题（经典黑、简约白、木纹棕、霓虹），一键全屏并保持屏幕常亮，可把旧手机、平板或电脑副屏变成桌面时钟、学习时钟或屏保。A large retro flip clock in your browser with 24/12-hour modes, seconds, date and weekday, four themes (classic black, white, walnut, neon), one-tap full screen and screen-awake — turn an old phone, tablet or second monitor into a desk clock or screensaver.
学术会议截稿倒计时（CCF 推荐会议，AoE 时间换算）Conference Deadline Countdown (CCF Ranked, AoE Converted)
约 380 个计算机领域学术会议（CVPR、NeurIPS、ICML、ACL、AAAI、SIGMOD、CCS 等）的摘要与全文截稿时间，按距离截稿排序并实时倒计时，按 CCF 等级（A/B/C）、CORE 等级和领域筛选，会议原时区（多为 AoE）自动换算为北京时间或其他时区，可收藏并下载 .ics 导入日历；数据为静态整理快照，日期以会议官网为准。Abstract and paper deadlines for about 380 computer-science conferences (CVPR, NeurIPS, ICML, ACL, AAAI, SIGMOD, CCS…), sorted by time left with live countdowns, filtered by CCF rank (A/B/C), CORE rank and area.
多通道计时器（多个倒计时同时运行）Multi Timer — Several Countdowns at Once
在一个页面同时运行任意多个倒计时和秒表：每个计时器可命名、单独开始/暂停/重置、加一分钟，时间到会响铃、标签页闪烁提示并可发送系统通知；计时状态保存在本机，刷新或关闭后回来仍在继续，适合做饭、健身组间休息、实验、考试和课堂活动。Run as many countdowns and stopwatches as you need on one page — each named, with its own start/pause/reset and +1 min.
2027年放假安排（含2026年）调休日历China Public Holiday Schedule 2027 & 2026
按国务院办公厅最新通知整理 2027 年和 2026 年元旦、春节、清明、劳动节、端午、中秋、国庆的放假时间、连休天数和调休上班日期，配全年日历（休/班标注）、距下一个假期倒计时、计入调休的工作日计算器，可导出 .ics 日历导入手机。The official 2027 and 2026 arrangements from the State Council General Office: dates, break length and make-up working days for New Year, Spring Festival, Qingming, Labour Day, Dragon Boat, Mid-Autumn and National Day — with a full-year calendar, a countdown to the next break, a working-day calculator that counts make-up days, and .ics export.