# Date & Time Tools

> Timestamps, date math, timers, time zones, calendars, countdowns, cron expressions and habit tracking.

- URL: https://qilingtools.com/en/tags/time
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

## Tools (17)

- [Timestamp Converter](https://qilingtools.com/en/timestamp): Free online Unix timestamp converter: convert timestamps and dates, auto-detect seconds or milliseconds, and show local, UTC, ISO 8601 and relative time.
- [Cron Expression](https://qilingtools.com/en/cron): Free online cron tool: parse a 5-field cron (min hour dom mon dow), break down each field and predict the next 5 run times in your local zone. Computed locally.
- [Date Calculator](https://qilingtools.com/en/date-calc): Free online date calculator: days, weeks, months and workdays between two dates; add or subtract to find a date and its weekday; exact age and next birthday.
- [Online Timer](https://qilingtools.com/en/timer): Free online timer: countdown with presets, alarm and screen flash; stopwatch with laps; Pomodoro 25/5 cycles. Big digits, accurate in background tabs.
- [Time Zone Converter](https://qilingtools.com/en/timezone): Free online time zone converter and world clock: pick a time and see it in New York, London, Tokyo, Shanghai or any city, with UTC offsets and DST handled.
- [Chinese Lunar Calendar](https://qilingtools.com/en/calendar): Free Chinese lunar calendar for 1900–2100: lunar dates, zodiac, stem-branch years, the 24 solar terms with exact times, festivals and a lunar date converter.
- [Days Until / Days Since](https://qilingtools.com/en/countdown): Free online days-until and days-since counter: add exams, holidays and anniversaries and see a live count to the second, with repeats and a share link.
- [Time Calculator](https://qilingtools.com/en/math/time-calc): Free time calculator: add or subtract hours, minutes and seconds, time between two clock times (even overnight), timesheet totals and decimal hours.
- [Habit Tracker](https://qilingtools.com/en/habit-tracker): Free habit tracker: daily or weekly goals, one-tap check-ins, current and best streaks, monthly calendar, yearly heatmap, stats, notes and JSON/CSV export.
- [Calendar Maker](https://qilingtools.com/en/calendar-maker): Free printable calendar maker: a year on one page or a page per month, with holidays, week numbers, events, monthly photos and themes. Print or export PNG.
- [TOTP Generator](https://qilingtools.com/en/totp): Generate and verify TOTP / HOTP 2FA codes from a Base32 secret or otpauth:// URI. SHA1/256/512, 6–8 digits, custom period, countdown, new secrets and QR codes.
- [Printable Planner Maker](https://qilingtools.com/en/planner): Printable planner pages: daily, weekly, monthly, year at a glance, habit tracker, to-do, meal plan, budget and reading log, with auto dates for a month or year.
- [Learn to Tell Time](https://qilingtools.com/en/math/clock): Interactive teaching clock: drag linked hands, see the time in words (quarter past three), work out elapsed time, take quizzes and print clock worksheets.
- [Meeting Planner](https://qilingtools.com/en/meeting-planner): Find a meeting time across time zones: add cities and working hours, see overlaps on a 24-hour timeline, get best-time picks and export .ics or Google Calendar.
- [Countdown Video Maker](https://qilingtools.com/en/video/countdown): Create countdown timer videos online: digital, flip clock, ring, big numbers or film leader, up to 60 minutes, with beeps, green screen or transparent WebM.
- [Shift Schedule Maker](https://qilingtools.com/en/shift-schedule): Free shift scheduler: set staff, shifts and daily headcount, then auto-build a fair roster that respects rest and weekly-off rules. Rotations, print, CSV.
- [ICS Calendar File](https://qilingtools.com/en/ics): Free online ICS generator: build .ics files with times, location, recurrence and alarms for Apple Calendar, Outlook or Google, or read an .ics someone sent you.