Date & Time
Date and time calculators for ages, date gaps, business days, week numbers, timestamps and fixed UTC-offset conversions.
More Date & Time
Additional published tools in this category.
Add or Subtract Days Calculator
Add a positive or negative number of calendar days to a selected date.
Open tool →Age Calculator
Calculate age in completed years, months and days between two dates.
Open tool →Business Days Calculator
Count Monday-through-Friday calendar days between two dates, including both endpoints.
Open tool →Date Difference Calculator
Find the number of calendar days between two dates.
Open tool →Days Until Date Calculator
Calculate how many calendar days remain until a selected date, or how many days have passed since it.
Open tool →ISO Week Number Calculator
Find the ISO-8601 week number and week-year for a calendar date.
Open tool →Time Duration Calculator
Find elapsed hours and minutes between two clock times.
Open tool →Time Zone Offset Calculator
Convert a date and clock time between two numeric UTC offsets.
Open tool →Unix Timestamp Converter
Convert a local date/time to a Unix timestamp or convert a Unix timestamp to a readable UTC date/time.
Open tool →About Date & Time
Date and time calculators for ages, date gaps, business days, week numbers, timestamps and fixed UTC-offset conversions.
Each tool page includes its own inputs, method or formula, example and relevant notes. Use the topic sections above to move between closely related tasks, or browse the complete SmartCheu tools directory.