Convert Time Between Time Zones
Translate timestamps across time zones, do date math, and inspect ISO durations or date ranges from one calculator.
Try it now
Try it now
Open Timezone / Date Math Calculator with a ready-to-run example.
When you need this
- You need to translate a support incident timestamp between teams in different regions.
- You want to add business days to a target date without opening a spreadsheet.
- You need to inspect an ISO duration or compare an incident time range quickly.
How to do it with Daily Developer Tools
- Enter the source date/time and choose the source and target time zones.
- Use the date math tab for day, week, month, or business-day offsets.
- Use the duration tab to parse ISO durations and compare start/end ranges.
Tips / common pitfalls
- Include a timezone offset or trailing Z when the source timestamp is already absolute.
- Use business-day mode for release planning or SLA calculations that skip weekends.
- Compare the UTC output and epoch values when you need a machine-readable handoff.
Examples & test data
UTC support timestamp to New York
Input example
2026-04-04 15:30
Expected output
UTC plus converted target-zone time and epoch values
FAQ
Can it add business days as well as plain calendar days?
Yes. The date math tab supports both calendar-day and business-day offsets.
Does it parse ISO durations like P3DT4H30M?
Yes. The duration tab breaks down ISO durations and can compare explicit date ranges too.
Related tools
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