Remote Work & Travel
World Clock & Awake Overlap
Calculate working overlap windows and schedule calls without waking anyone up in the middle of the night.
Awake Overlap Calculator
Select two cities to see their shared waking hours (08:00–22:00 local time):
The overlap principle
The secret to smooth remote teamwork is knowing when both sides are inside normal waking hours. Even across large geographical separations, finding 2 to 4 overlapping working hours allows teams to sync without late-night disruptions.
Frequently Asked Questions
How is awake overlap calculated between two time zones?
Awake overlap evaluates the shared hours when people in both cities are awake (typically between 08:00 and 22:00 local time), factoring in exact daylight saving time shifts.
What is the best time for a meeting between London and San Francisco?
San Francisco is 8 hours behind London. The optimal meeting window is 16:00 to 18:00 London time (08:00 to 10:00 San Francisco time).
Interactive solar day/night map on your iPhone
Drag the time slider to scrub through the entire 24-hour day and see sunlight move across the globe in real time.