Free Date & Time Tools – Days Until, Work Hours & Meeting Planner
Date and time calculations that seem simple often require more precision than mental math allows - how many days until an event, converting time between world timezones, how many billable hours were worked in a week, or what time a meeting will be across different time zones. These 4 datetime tools solve those exact problems with a clean input-and-result interface and no account required.
Days Until Calculator
Count the days from today until any date or event - a holiday, birthday or deadline - and see the same span as weeks plus days and as hours.
Work Hours Calculator
Calculate total work hours and overtime online free - no login. Enter your start and end times for each day, add breaks, and instantly see total hours worked and overtime pay.
Meeting Time Zone Planner
Plan meetings across multiple time zones online free - no login. Enter your cities and find the best overlap time for international meetings, with a clear visual comparison across zones.
Timezone Converter
Free online timezone converter to convert date and time between any two world timezones instantly. No signup, no install, browser-based using the Intl API.
How to use these tools
Select the tool that matches your task, open it, and follow the steps below.
- Pick the tool: days until a date, a weekly work-hours timesheet, a meeting planner across time zones, or a converter between two cities' times.
- Enter a date, your shift times, or the cities involved - results update in your browser as you type or pick.
- Read the result in the units you need: days and weeks, decimal hours and overtime, or the local time in each city.
Common ways to use these tools
- Count the days until a birthday, exam or deadline, with quick picks for New Year, Valentine's Day, Halloween and Christmas.
- Total a week of shifts with breaks, including overnight shifts, and split out daily or weekly overtime before payroll.
- Find an hour that falls inside business hours (9:00 to 18:00) for colleagues in several time zones.
- Convert a date and time between two of 23 major city time zones, with daylight saving applied for that date.