Date & Time Tools
Dates, Durations and Deadlines
Calculate business days, exact ages, countdowns, work hours, time zones and timestamp conversions with focused browser-based tools.
Days Between Dates
Count calendar days between two dates with an optional inclusive end date.
Date & Time ToolsBusiness Days Calculator
Count weekdays between dates while excluding weekends and optional holidays.
Date & Time ToolsAdd Days to Date
Add days, weeks, months or years to a start date and get the resulting date.
Date & Time ToolsSubtract Days from Date
Subtract days, weeks, months or years from a date to find an earlier date.
Date & Time ToolsWeek Number Calculator
Find the ISO week number, ISO week year and week start/end dates.
Date & Time ToolsAge Calculator
Calculate exact age in years, months and days for any as-of date.
Date & Time ToolsCountdown Calculator
Count days, weeks, hours and minutes until a target date.
Date & Time ToolsWork Hours Calculator
Calculate daily and weekly work time from start time, end time, breaks and workdays.
Date & Time ToolsTime Duration Calculator
Calculate duration between two clock times, including overnight ranges.
Date & Time ToolsTime Zone Converter
Convert a date and time between common time zones.
Date & Time ToolsUnix Timestamp Converter
Convert Unix timestamps to UTC dates and UTC dates back to timestamps.
Date & Time ToolsMonth Calculator
Calculate full months and remaining days between two dates.
Date & Time ToolsDays Until Holiday
Count days until common fixed-date holidays such as Christmas or New Year's Day.
Date & Time ToolsSchool Days Calculator
Count school days between dates while excluding weekends and custom no-school days.
Date & Time ToolsPay Period Calculator
Find the pay period start and end date for weekly, biweekly, semimonthly or monthly cycles.