Global Collaboration

World Timezone & Meeting Planner Matrix

Find the optimal meeting window across international time zones. Visual 24-hour comparative schedule color-coding work hours (green), fair hours (yellow), and night hours (gray).

Target Meeting Date

Work (9am–5pm) Fair (7–9am / 5–9pm) Night (9pm–7am)

Location	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
New York USA (EDT/EST)	20	21	22	23	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19
London UK (BST/GMT)	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0
Paris / Berlin EU (CEST/CET)	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0	1
Dubai UAE (GST)	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0	1	2	3
Singapore SG (SGT)	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0	1	2	3	4	5	6	7
Tokyo Japan (JST)	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0	1	2	3	4	5	6	7	8
Sydney Australia (AEST/AEDT)	10	11	12	13	14	15	16	17	18	19	20	21	22	23	0	1	2	3	4	5	6	7	8	9
San Francisco USA (PDT/PST)	17	18	19	20	21	22	23	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16

Finding Golden Cross-Continent Overlaps

Global Meeting Tips

Scheduling across Europe, North America, and Asia requires finding mutually agreeable time windows:

US East (New York) & Europe (London/Paris): 13:00 to 17:00 UTC (9:00 AM - 1:00 PM in New York, 2:00 PM - 6:00 PM in London). This is the highest-overlap transatlantic corridor.
Europe (London) & Asia (Tokyo/Singapore): 07:00 to 10:00 UTC (8:00 AM - 11:00 AM in London, 3:00 PM - 6:00 PM in Singapore, 4:00 PM - 7:00 PM in Tokyo).
US West Coast & Asia-Pacific: Late afternoon in California (4:00 PM - 6:00 PM) aligns with morning in Tokyo and Sydney (8:00 AM - 10:00 AM next day).

DST & Daylight Saving Shifts

Automatic IANA Tracking

Daylight Saving Time transitions occur on different weekends between North America (early March / early November) and Europe (late March / late October).

Our matrix uses precise IANA timezone database rules to accurately account for asymmetric daylight saving shifts on any chosen calendar date.

Frequently Asked Questions

World Timezone & Meeting Questions

What is UTC and why is it used as the baseline?

Coordinated Universal Time (UTC) is the primary world time standard without daylight saving adjustments. By anchoring time slots in UTC, participants across any hemisphere can coordinate without timezone confusion.

How can a team spanning US West Coast and Tokyo find meeting time?

The best window is typically 4:00 PM to 6:00 PM Pacific Time (PST/PDT), which corresponds to 9:00 AM to 11:00 AM the following morning in Tokyo (JST).