devDeveloper toolbox
Date & time
Browse date & time tools. Every tool processes your input locally in your browser.
Date & time
8 toolsISO Week Number
Find the ISO week number and ISO week year for a date.
Open tool →Working Day Calculator
Count weekdays inclusively, excluding optional holiday dates.
Open tool →Unix Timestamp Converter
Convert Unix seconds or milliseconds to dates and dates to timestamps.
Open tool →Timezone Converter
Convert a local date/time between IANA time zones in your browser.
Open tool →Cron Expression Parser
Explain standard or Quartz cron expressions and show upcoming local runs.
Open tool →Duration Calculator
Calculate elapsed time between two dates in your browser.
Open tool →Age Calculator
Calculate age from a birth date using the local calendar date.
Open tool →Date Format Converter
Parse an ISO date and display common UTC and locale formats.
Open tool →Every tool processes your input locally in your browser.