Date & Time Tools
Age Calculator
Calculate age in years, months, and days with an optional target date.
Date & Time Tools
Date and time tools help with age lookups, planning, scheduling, countdowns, timers, and simple calendar math without spreadsheets or manual counting.
Included Tools
Tools in Date & Time Tools
Calculate dates, countdowns, durations, and focus sessions with clean browser-based tools.
Date & Time Tools
Days Between Dates
Measure the difference between two dates in days, weeks, months, and years.
Date & Time Tools
Countdown Calculator
Count down to a target date and time with live day, hour, minute, and second output.
Date & Time Tools
Add/Subtract Days Calculator
Add or subtract a number of days from any date and get the resulting calendar day.
Date & Time Tools
Time Duration Calculator
Measure the duration between two date-times in days, hours, minutes, and seconds.
Date & Time Tools
Study Timer
Run a focused study countdown with custom duration and simple local settings.
Date & Time Tools
Pomodoro Timer
Run focus and break cycles with browser-based Pomodoro settings and local persistence.
Date & Time Tools
Leap Year Checker
Check whether a year is a leap year and find the nearest leap years around it.