Date Difference Calculator
Calculate the days between two dates, plus approximate weeks, months, and years for planning and timelines.
Date & Time
OpenFree date and time tools
Date and time tools help with planning deadlines, events, schedules, countdowns, logs, and cross-time-zone work.
Business Days Calculator
Count weekdays between two dates.
Date & Time
OpenBirthday Countdown
Count days until the next birthday.
Date & Time
OpenTime Zone Converter
Convert a time between common global time zones.
Date & Time
OpenTimestamp Converter
Convert Unix timestamps and ISO 8601 dates.
Date & Time
OpenPlanning with dates
Use date calculators to count elapsed days, weekdays, and countdowns. Exact day counts are useful for timelines, while approximate months and years are better for quick planning.
For official deadlines, always confirm whether rules include the start date, weekends, holidays, or local time zones.
Frequently asked questions
Are date differences inclusive?
Wraplet date tools explain the counting method on each tool page. For official deadlines, check whether the rule counts inclusive dates.
Can I use these tools across time zones?
Use the Time Zone Converter for schedule comparisons and the Timestamp Converter for developer logs and API timestamps.