Time & Date

Timestamp, timezone and calendar utilities: ISO 8601 conversion, Unix epoch conversion, business-day counting, age calculation and cron scheduling.

ISO 8601 Date Converter

Convert between ISO 8601 timestamps and readable dates, showing UTC, your local time and the exact offset side by side.

Convert Unix timestamps in seconds or milliseconds to readable dates and back, with UTC and local views. Handles negative and large values.

Count business days and calendar days between two dates, with a configurable workweek and your own holiday list. Inclusive behaviour is explicit.

Calculate an exact age in years, months and days from a date of birth, with total days, weeks and the next birthday. Leap years handled correctly.

Build a valid cron expression field by field, read it back in plain English, and see the next scheduled run times before you deploy it.

Convert a time between any two time zones with correct daylight saving, real UTC offsets, and the date shift shown explicitly.

Add or subtract durations from a time, find the gap between two times, and sum several durations — with midnight crossings shown clearly.

Add up hours worked across several days with breaks and overnight shifts, in both clock and decimal hours, with optional pay.