ClockAlign

Timezone answer

Best Meeting Time: San Francisco & Sao Paulo

Sao Paulo is currently 4 hours ahead of San Francisco (this can shift with daylight saving time). Working hours (9am–6pm) overlap from 9 AM to 2 PM San Francisco time. ClockAlign ranks the slots inside that window by when both sides are cognitively sharp, not just awake.

🇺🇸 San Francisco, United States of America
PDT · America/Los_Angeles
🇧🇷 Sao Paulo, Brazil
GMT-3 · America/Sao_Paulo

Use the interactive finder below to compare local times, golden windows, and sacrifice scores for this city pair. Timezone offsets use current daylight-saving rules, so always confirm the final date before sending calendar invites.

Sources: IANA Time Zone Database · CDC/NIOSH fatigue and work guidance

Free Golden Window finder

When is everyone actually sharp?

Add your team across time zones. ClockAlign maps each person’s energy through the day and finds the fairest, sharpest time to meet — not just when everyone’s awake.

Your team · 2 people
SF
San Francisco
🇺🇸San Francisco · PDT
SP
Sao Paulo
🇧🇷Sao Paulo · GMT-3
Team energy across the day · times in UTC
AsleepGroggyAwakeGolden
00:0006:0012:0018:0024:00
San Francisco11:30 AM PDT
Sao Paulo3:30 PM GMT-3
18:30 UTC
Drag anywhere on the timeline to test a meeting time · the glow marks the best window
Best times to meet
Selected time
18:30UTC
2Worst sacrifice
89%Fairness
2Teammates
SFSan Francisco11:30 AM PDTGolden1
SPSao Paulo3:30 PM GMT-3Sharp2
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