Dates & Time Tools
Timestamps, time zones, calendars
Unix Timestamp Converter
Free online unix timestamp converter. Convert Unix timestamps to human date and back. Plan and calculate dates effortlessly.
Date Arithmetic
Free online date arithmetic. Add/subtract days, months, years from a date. Plan and calculate dates effortlessly.
Date Range Calculator
Free online date range calculator. Total days, weeks, months between two dates. Plan and calculate dates effortlessly.
Business Days Calculator
Free online business days calculator. Count working days excluding weekends. Plan and calculate dates effortlessly.
Time Zone Converter
Free online time zone converter. Convert time across time zones (Intl API). Plan and calculate dates effortlessly.
Day of Year Calculator
Free online day of year calculator. Current day number, remaining days. Plan and calculate dates effortlessly.
Week Number Calculator
Free online week number calculator. ISO week number for any date. Plan and calculate dates effortlessly.
Time Duration Calculator
Free online time duration calculator. Hours:minutes:seconds between two times. Plan and calculate dates effortlessly.
Date Format Converter
Free online date format converter. Convert between ISO, US, EU, custom formats. Plan and calculate dates effortlessly.
Holiday Calendar
Free online holiday calendar. Major global holidays for a given year. Plan and calculate dates effortlessly.
Moon Phase Calculator
Free online moon phase calculator. Moon phase for any date (lunar algorithm). Plan and calculate dates effortlessly.
Countdown Calculator
Free online countdown calculator. Calculate days until a target date. Plan and calculate dates effortlessly.
Chronological Age
Free online chronological age. Exact age in years, months, days. Plan and calculate dates effortlessly.
Season Finder
Free online season finder. Find astronomical season for date. Plan and calculate dates effortlessly.
Leap Year Checker
Free online leap year checker. Check if a year is a leap year. Plan and calculate dates effortlessly.
Weekend Finder
Free online weekend finder. Find next or previous weekend date. Plan and calculate dates effortlessly.
Sunrise/Sunset Calculator
Free online sunrise/sunset calculator. Approximate sunrise/sunset times. Plan and calculate dates effortlessly.
Decimal Time Converter
Free online decimal time converter. Convert decimal hours ↔ HH:MM. Plan and calculate dates effortlessly.
Online Timer
Free online online timer. Countdown timer with alarm. Plan and calculate dates effortlessly.
Online Stopwatch
Free online online stopwatch. Precision stopwatch with lap times. Plan and calculate dates effortlessly.
Countdown Timer
Free online countdown timer. Customizable event countdown. Plan and calculate dates effortlessly.
World Clock
Free online world clock. Current time in multiple cities. Plan and calculate dates effortlessly.
Calendar Generator
Free online calendar generator. Generate printable monthly/yearly calendars. Plan and calculate dates effortlessly.