Remote-Work Timezone Overlap Calculator
Workday or evening/couple overlap between SetTern hubs — pure IANA timezone math, with DST.
Planning only — not legal, tax, or immigration advice. Confirm on official portals.
Remote-Work Timezone Overlap Calculator is a free SetTern planning tool. Workday or evening/couple overlap between SetTern hubs — pure IANA timezone math, with DST. Pure timezone overlap math — not a remote-work visa or tax determination. Sources are cited on the page — confirm details on the official portals linked.
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Check how many working hours overlap between your home city and a destination city, based on live IANA timezone data.
1h overlap/day
London ↔ Singapore
Singapore is +7h relative to London (Europe/London vs Asia/Singapore).
Singapore's work window (9:00–17:00 local) falls at 2:00–10:00 on London's clock.
- UTC offsets are computed live from the IANA time zone database via Intl.DateTimeFormat, so daylight-saving transitions are reflected automatically for `referenceDate`.
- Overlap assumes both cities keep the same style of work window (defaults to your home hours) — pass destWorkStartHour/destWorkEndHour to model a different local schedule.
- overlapQuality buckets are simple thresholds on the computed hours (0 / <4 / ≥4), not an external benchmark.
Planning only — not legal, tax, or immigration advice. Confirm on official portals.
Verified official sources
- SetTern methodologysettern.io — How we cite costs, visas, and tool limits — not legal advice.
- SetTern editorial policysettern.io — E-E-A-T, fact verification, and update cadence.
- SetTern city hubssettern.io — City list and IANA timezone mapping.
Common questions
- Is Remote-Work Timezone Overlap Calculator legal or immigration advice?
- No. SetTern tools screen cited government and catalog data for planning only. Confirm eligibility, fees, and deadlines on the official portals linked on this page.
- Does this account for daylight saving?
- Yes — overlap uses IANA zones via the JavaScript Intl API for the selected cities.
- Is this immigration or tax advice for remote work?
- No. It is pure scheduling math for planning calls across hubs.