A distributed-team planning guide using IANA zones, UTC-safe business-day counts, and shareable Markdown tables.
Use IANA zones instead of city abbreviations
Abbreviations such as EST or CST can name multiple regions and hide daylight-saving changes. IANA identifiers let the browser apply the correct offset for the chosen date.
Write the source time as ISO with Z or an explicit offset, and show the local date as well as the clock time because conversion may cross midnight.
- Use UTC or an explicit source offset.
- Show every participant's local date.
- Confirm before sending the invitation.
Do not confuse weekdays with legal deadlines
Monday-to-Friday counting helps project estimates, but national holidays, regional leave, half-days, and company calendars are not automatic. Holidays and endpoint inclusion must be explicit inputs.
UTC-safe date arithmetic avoids daylight-saving off-by-one errors. Legal, interest, or employment deadlines still require an authoritative calendar and qualified interpretation.
- Record the holiday source and year.
- State the inclusion rule in output.
- Verify legal deadlines with an authoritative source.
Turn the decision into a shareable table
A Markdown table can capture source ISO time, IANA zone, local date, and confirmation status as separate columns, creating a common reference for a project document.
The table sends no invitation or update. Add human confirmation, holiday changes, and rounding decisions before sharing a final version.
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