Add Days to Date
Add or subtract calendar days from a selected date.
Date Time Tools
Calculate dates, durations, schedules, calendars, workdays, timestamps, and time planning outputs.
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Business Days Calculator
Count weekdays between two dates, excluding weekends.
Add Workdays Calculator
Add business days to a start date while skipping weekends.
Week Number Calculator
Find the ISO week number for any date.
Day of Week Calculator
Find the weekday name for a selected date.
Leap Year Checker
Check whether a selected year is a leap year.
Countdown Calculator
Calculate days, hours, and minutes until a future date and time.
Unix Milliseconds Converter
Convert Unix milliseconds to readable dates and back.
All 25 tools
Browse every date time tools.
Countdown Calculator
Calculate days, hours, and minutes until a future date and time.
Date Time ToolsTime Card Calculator
Calculate daily work duration from clock-in, clock-out, and break time.
Date Time ToolsDeadline Buffer Calculator
Calculate buffer days and completion date before a deadline.
Date Time Tools
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About Date Time Tools
ConvertA2Z keeps date time tools simple, fast, and mobile-friendly. Each live tool is built around a focused workflow, clear input fields, visible output actions, and related tools so users can move to the next task without searching again.
More advanced server-side conversion, OCR, AI, and media processing features can be added in later phases after backend processing and file retention policies are finalized.