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Built for every time zone
World Time, Date & Time Zone Tools
Plan across cities, calculate exact date spans, and make sense of time anywhere in the world.
Try “Tokyo”, “UTC+5:30” or “days between dates”
Right now around the world
Open full world clock →
The world at a glance
Simple, precise, free
Tools for every kind of time
Time Zone Converter
Compare local times across cities without the mental math.
Days Between Dates
Find the exact span in days, weeks and weekdays.
Date Calculator
Add or subtract days, weeks, months and years.
Business Days
Count working days with weekends and holidays.
Method and sources
Time results you can inspect and explain
Every result is built from named time-zone rules, explicit calendar arithmetic, and reviewable source data. These details help people and search or AI systems understand what a result means, when it can change, and where to verify it.
Date-aware IANA time zones
Conversions keep the date and named IANA zone together, so historical offsets and daylight-saving transitions are applied instead of treating an abbreviation as a fixed rule.
Browse time zones →Defined calendar arithmetic
Date tools state how they handle leap years, month ends, inclusive business-day ranges, weekends, and ISO week-years so the same input has an explainable result.
Open the date calculator →Reviewable holiday sources
We publish only country and year combinations stored as reviewed records. Calendar pages link to the source retained with those records and explain regional or observed-date limits.
Check holiday calendars →Private by default
Calculator inputs are used for the immediate result and are not saved as user records. Favorites and recent items stay in this browser unless you clear them.
Read the privacy policy →