Date & Time
Date tools answer everyday calendar questions: what day it will be in a given number of days, how far apart two dates are, and similar lookups.
Each calculator works on calendar dates rather than clock timestamps, so results stay stable across time zones and daylight saving changes. Elapsed days are not the same as an inclusive count of both dates — the days-between guide explains when to add one.
Weekends stay in a normal day count. Use the business-days tool only when a contract or school calendar skips Saturday and Sunday. That count still includes weekday public holidays, including Sweden’s named helgdagar and Åland’s Autonomy Day on 9 June.
Featured in this category
Days Between Dates
Count how many calendar days separate two dates, including the week-and-remainder breakdown.
Age Calculator
Calculate age in years, months and days from a birth date to today or to any target date.
Days From Today
Find the exact calendar date a set number of days before or after a chosen start date.
Business Days
Count weekdays between two dates, excluding Saturday and Sunday. Public holidays are not removed.
Guides
Calendar dates
Days From Today
Find the exact calendar date a set number of days before or after a chosen start date.
Days Ago
Find the calendar date a given number of days before today, or before any start date you choose.
Day of Week
Look up which weekday a calendar date falls on, without time-zone shifts.
Birthday Countdown
See the next birthday date, weekday and how many days remain from today.
Durations
Days Between Dates
Count how many calendar days separate two dates, including the week-and-remainder breakdown.
Weeks Between Dates
See how many full weeks (and leftover days) separate two calendar dates.
Months Between Dates
Count whole calendar months between two dates, plus leftover days and a years-and-months split.
Age Calculator
Calculate age in years, months and days from a birth date to today or to any target date.
Business Days
Count weekdays between two dates, excluding Saturday and Sunday. Public holidays are not removed.
Time Duration
Find hours and minutes between two clock times, including overnight spans that cross midnight.
All date & time tools
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10 tools
Days From Today
Find the exact calendar date a set number of days before or after a chosen start date.
Days Ago
Find the calendar date a given number of days before today, or before any start date you choose.
Days Between Dates
Count how many calendar days separate two dates, including the week-and-remainder breakdown.
Weeks Between Dates
See how many full weeks (and leftover days) separate two calendar dates.
Months Between Dates
Count whole calendar months between two dates, plus leftover days and a years-and-months split.
Age Calculator
Calculate age in years, months and days from a birth date to today or to any target date.
Business Days
Count weekdays between two dates, excluding Saturday and Sunday. Public holidays are not removed.
Day of Week
Look up which weekday a calendar date falls on, without time-zone shifts.
Birthday Countdown
See the next birthday date, weekday and how many days remain from today.
Time Duration
Find hours and minutes between two clock times, including overnight spans that cross midnight.