Date and Time Tools
Calculate date differences, convert timestamps, work with time zones and manage timers.
Quick access
- Date Difference Calculator
- Date and Time Addition and Subtraction
- Online Countdown Timer
- Online Stopwatch
View all
Date Difference Calculator
Compare two local dates and times as elapsed duration, with totals in days, hours, minutes and seconds.
Date and Time Addition and Subtraction
Choose Add or Subtract for whole years, months, days, hours, minutes and seconds. Add is the default; negative values reverse the selected operation. Month ends are clamped. Use local dates and check UTC around daylight-saving changes.
Online Countdown Timer
Set hours, minutes and seconds for a browser countdown with Start, Pause and Reset.
Online Stopwatch
Measure elapsed time with start, pause, resume, lap and reset controls in the browser.
Unix Timestamp Converter
Convert between Unix timestamps and readable local or UTC date-time values.
Age Calculator
Calculate completed years, elapsed calendar days and the next birthday date from a birth date and your device’s current local date.
Gregorian and Lunar Calendar
Browse a monthly Gregorian calendar with optional Chinese lunar dates, holidays and date details.
China Public Holiday Reference 2026
View the official mainland China holiday periods and six substitute working days for 2026.
Business Day Calculator
Working days under your rules. Includes both dates. Uses only your selected weekdays and date overrides; no official holiday calendar is loaded.
Day of Week Calculator
Find the weekday for a Gregorian date from year 1 to 9999, check the result and copy it in your browser.
Current Beijing Time
Display the current time in China Standard Time, UTC+08:00, without daylight-saving changes.
Browser alarm reminder
Sound · Snooze 5 minutes · Repeat daily · Enable notifications. Keep the page open and test sound first. Browser permissions, background throttling and device sleep can delay or prevent sound or notifications; this cannot guarantee a wake-up alarm.
World Clock
View current time in eight fixed time zones, refresh the comparison and copy all eight rows.
Gregorian to Chinese Lunar Calendar
Convert a supported Gregorian date to its Chinese lunar year, month and day.
Chinese Lunar Date Lookup
Convert a Chinese lunar year (1900–2100), month and day to a Gregorian date, with an explicit leap-month choice.
Chinese Ganzhi Date and Gregorian-Year Zodiac Reference
View Ganzhi year/day labels and an animal sign, choosing a Gregorian or Chinese lunar year boundary. This is a cultural date reference without auspicious-day advice.
24 Solar Term Dates by Year — China UTC+8
List the 24 Chinese solar term dates for a Gregorian year from 1901 to 2100, using China Standard Time (fixed UTC+8).
Chinese New Year Countdown
Calculate the calendar days remaining until the next listed Chinese New Year date. The date table covers 2026–2030.
Retirement Date Estimator
Estimate a retirement date from a birth date and selected retirement age.
Traditional Chinese Two-Hour Period Converter
Map a clock time to one of the twelve traditional Chinese two-hour periods.
BaZi Birth Chart Reference
Generate a date-level Four Pillars reference from a birth date, time and UTC offset. Uses Hong Kong Observatory solar-term dates for 1901–2100 and China UTC+8; no exact transition times, historical zone rules or true solar-time correction.
Nearby Years with the Same Chinese Zodiac Animal
List nearby Gregorian years sharing the Chinese zodiac animal of a chosen year, with its stem-branch label.
Western Zodiac Sign Finder
Find the Western zodiac sign for a Gregorian date using this tool’s fixed month-and-day table.
Chinese Zodiac Year Lookup
Look up the Chinese zodiac animal and stem-branch label for one Gregorian year; no birth date is analysed.
Date Calculator
Calculate the absolute calendar-day difference between two dates and add or subtract whole days from the starting date.