San Juan to Havana Time
AST to CST Converter — 9 AM AST is 8:00 AM CST
San Juan is 1 hour ahead of Havana. Convert any time between San Juan (AST) and Havana (CST/CDT) instantly.
San Juan
Puerto Rico
Havana
Cuba
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Time Zone Comparison
San Juan to Havana Time Conversion Table
| San Juan (AST) | Havana (CST) |
|---|---|
| 12:00 AM | 12:00 AM |
| 2:00 AM | 2:00 AM |
| 4:00 AM | 4:00 AM |
| 6:00 AM | 6:00 AM |
| 8:00 AM | 8:00 AM |
| 10:00 AM | 10:00 AM |
| 12:00 PM | 12:00 PM |
| 2:00 PM | 2:00 PM |
| 4:00 PM | 4:00 PM |
| 6:00 PM | 6:00 PM |
| 8:00 PM | 8:00 PM |
| 10:00 PM | 10:00 PM |
San Juan & Havana — Business & Scheduling Guide
San Juan (Puerto Rico) is a US territory with pharmaceutical and tech manufacturing, with key industries in pharmaceuticals, medical devices, electronics, and tourism. Havana (Cuba) is a Caribbean economy undergoing gradual economic opening, known for tourism, biotechnology, agriculture (sugar, tobacco), and nickel. With a 1-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between San Juan and Havana
With only a 1-hour gap, San Juan and Havana have generous overlapping work hours. Morning calls in the earlier time zone align well with mid-day in the other. Puerto Rican business hours are typically 8 AM–5 PM, with a bilingual (English/Spanish) workforce. Cuban business hours are typically 8 AM–5 PM, with a well-educated workforce and growing private sector. Most teams find that late morning to early afternoon offers the widest window for collaboration.
Daylight Saving Time Considerations
Havana observes Daylight Saving Time (CST/CDT), while San Juan stays on AST year-round. When Havana switches to daylight time, the effective time difference shifts by 1 hour. This typically happens in spring and fall, and the exact dates vary by country. If you have recurring cross-timezone meetings, recalculate the schedule after each DST transition.
Collaboration Tools & Workflow
Teams working between San Juan and Havana enjoy strong real-time collaboration potential. With just a 1-hour time difference, daily standups, pair programming, and spontaneous video calls are all practical. Popular tools for San Juan–Havana teams include Slack for real-time messaging, Google Meet or Zoom for video calls, and Notion or Linear for project management. The overlapping work window is wide enough that most teams can operate nearly synchronously.
Remote Work Between San Juan & Havana
San Juan, a key city in Puerto Rico, and Havana, a key city in Cuba, are well-connected for remote work. With a manageable 1-hour time difference, distributed teams can maintain a near-synchronous workflow. Both cities have strong internet infrastructure, coworking spaces, and established remote work cultures. For freelancers and remote workers, this time zone pairing is ideal — you can serve clients in Havana from San Juan (or vice versa) without disrupting your standard workday.
AST to CST — Quick Reference
AST (AST) stands for the timezone used in San Juan, Puerto Rico (UTC-4). CST (CST/CDT) is the timezone used in Havana, Cuba (UTC-5). San Juan is 1 hour ahead of Havana.
To convert AST to CST, subtract 1 hours from AST time. For example, AST 9:00 AM = CST 8:00 AM.
Key Facts
- •Time difference: San Juan (UTC-4) is 1 hour ahead of Havana (UTC-5).
- •Daylight Saving Time: San Juan does not observe DST (AST). Havana observes DST (CST/CDT).
- •Regions: San Juan is located in Puerto Rico and uses the AST time zone. Havana is located in Cuba and uses the CST/CDT time zone.
- •Best time to call: The best time to call between San Juan and Havana is 10:00 AM to 4:00 PM in San Juan time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between San Juan and Havana?
San Juan is 1 hour ahead of Havana.
What time is it in Havana when it's 9 AM in San Juan?
When it's 9:00 AM in San Juan, it is 8:00 AM in Havana.
What time is 9 PM AST in CST?
9 PM AST (San Juan time) is 8:00 PM CST (Havana time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between San Juan and Havana?
The best time to schedule a meeting is between 10:00 AM to 4:00 PM in San Juan time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert AST to CST?
AST (AST) is the timezone for San Juan, Puerto Rico (UTC-4). CST (CST/CDT) is the timezone for Havana, Cuba (UTC-5). San Juan is 1 hour ahead of Havana. Quick examples: 9 AM AST = 8:00 AM CST, 12 PM AST = 11:00 AM CST, 3 PM AST = 2:00 PM CST, 6 PM AST = 5:00 PM CST.
Is San Juan ahead of or behind Havana?
San Juan is 1 hour ahead of Havana. When it's noon in San Juan, it's 11:00 AM in Havana.
Does San Juan or Havana change clocks for Daylight Saving Time?
No, San Juan does not observe DST — it stays on AST year-round. Havana observes DST and switches between CST/CDT. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
What time is noon in San Juan in Havana time?
When it is 12:00 PM (noon) in San Juan (AST), it is 11:00 AM in Havana (CST). This is often a popular time for scheduling lunch-hour calls across the San Juan–Havana corridor.
What are the overlapping work hours between San Juan and Havana?
The overlapping work hours between San Juan and Havana are approximately 10:00 AM to 4:00 PM in San Juan time, when both cities are within the standard 9 AM–5 PM workday. This is the ideal window for meetings, pair programming, and real-time collaboration.
What timezone is San Juan in?
San Juan is in the AST time zone (UTC-4). It is located in Puerto Rico. San Juan does not observe Daylight Saving Time.
What timezone is Havana in?
Havana is in the CST/CDT time zone (UTC-5). It is located in Cuba. Havana observes Daylight Saving Time, switching between CST/CDT.
How do I schedule a call between San Juan and Havana?
To schedule a call between San Juan and Havana, aim for the overlapping window of 10:00 AM to 4:00 PM in San Juan time. Use Google Calendar or Calendly with both time zones visible, share the meeting invite with the CST time clearly noted, and always double-check the time difference — especially during DST transitions. Pro tip: include both local times in the calendar invite title (e.g., "Sync — 10 AM AST / 9:00 AM CST").
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