The Universal Challenge: Business Hours Aren't Universal
While "9 to 5" is a universal shorthand for the workday, the actual hours — and more importantly, their UTC equivalents — vary dramatically. Understanding the UTC translation of each city's business hours is the foundation of global scheduling.
Major Business Hubs: Business Hours in UTC
- New York (EST/EDT): 9 AM–6 PM = 14:00–23:00 UTC (winter) / 13:00–22:00 UTC (summer)
- Los Angeles (PST/PDT): 9 AM–6 PM = 17:00–02:00 UTC (winter) / 16:00–01:00 UTC (summer)
- London (GMT/BST): 9 AM–6 PM = 09:00–18:00 UTC (winter) / 08:00–17:00 UTC (summer)
- Paris / Berlin (CET/CEST): 9 AM–6 PM = 08:00–17:00 UTC (winter) / 07:00–16:00 UTC (summer)
- Dubai (GST): 9 AM–6 PM = 05:00–14:00 UTC (no DST)
- Mumbai (IST): 9 AM–6 PM = 03:30–12:30 UTC (no DST)
- Singapore / KL (SGT/MYT): 9 AM–6 PM = 01:00–10:00 UTC (no DST)
- Seoul / Tokyo (KST/JST): 9 AM–6 PM = 00:00–09:00 UTC (no DST)
- Sydney (AEST/AEDT): 9 AM–6 PM = 23:00–08:00 UTC (winter) / 22:00–07:00 UTC (summer)
The UTC Goldmine: London's Business Hours
London's standard business hours (9 AM–6 PM GMT in winter) map directly onto 09:00–18:00 UTC. This makes London the easiest reference point for global scheduling — no mental arithmetic required in the winter months.
Business Week Variations
Not every country treats Monday–Friday as the business week:
- Middle East (UAE, Saudi Arabia): Business week is Sunday–Thursday. Friday is the holy day.
- Israel: Sunday–Thursday, with Friday as a short day before Shabbat.
- Most of Asia, Europe, Americas: Monday–Friday standard.
When scheduling with UAE or Saudi partners, note that their Friday = your Saturday and their Sunday = your Monday.
Lunch Hours and Local Culture
Even within "business hours," many cultures have protected lunch periods:
- Spain / Latin America: Extended lunch 2–4 PM; work may resume until 8 PM.
- France: Lunch 12–2 PM is largely protected; meetings rarely scheduled during this time.
- Japan / Korea: 12–1 PM lunch break, but meetings are commonly scheduled across lunch by senior staff.
- Germany: Work culture values ending strictly at 5–6 PM; late meetings are frowned upon.
Early Bird vs. Night Owl Cultures
Some cultures favor early starts: Germany and Scandinavia commonly start at 8 AM. Southern European and Latin American offices often start at 9–10 AM but work later. Understanding these rhythms helps you position your meeting requests appropriately within the local day.