Havana to San Juan Time
CST to AST Converter — 9 AM CST is 10:00 AM AST
Havana is 1 hour behind San Juan. Convert any time between Havana (CST/CDT) and San Juan (AST) instantly.
Havana
Cuba
San Juan
Puerto Rico
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Time Zone Comparison
Havana to San Juan Time Conversion Table
| Havana (CST) | San Juan (AST) |
|---|---|
| 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 |
Havana & San Juan — Business & Scheduling Guide
Havana (Cuba) is a Caribbean economy undergoing gradual economic opening, with key industries in tourism, biotechnology, agriculture (sugar, tobacco), and nickel. San Juan (Puerto Rico) is a US territory with pharmaceutical and tech manufacturing, known for pharmaceuticals, medical devices, electronics, and tourism. 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 Havana and San Juan
With only a 1-hour gap, Havana and San Juan have generous overlapping work hours. Morning calls in the later time zone align well with mid-day in the other. Cuban business hours are typically 8 AM–5 PM, with a well-educated workforce and growing private sector. Puerto Rican business hours are typically 8 AM–5 PM, with a bilingual (English/Spanish) workforce. 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), but San Juan does not — it stays on AST year-round. This means the time difference between Havana and San Juan changes by 1 hour when Havana switches clocks. During Cuba's summer, the gap is 0–2 hours instead of the standard 1 hours. Mark DST transition dates on your calendar to avoid missed meetings.
Collaboration Tools & Workflow
Teams working between Havana and San Juan 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 Havana–San Juan 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 Havana & San Juan
Havana, a key city in Cuba, and San Juan, a key city in Puerto Rico, 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 San Juan from Havana (or vice versa) without disrupting your standard workday.
CST to AST — Quick Reference
CST (CST/CDT) stands for the timezone used in Havana, Cuba (UTC-5). AST (AST) is the timezone used in San Juan, Puerto Rico (UTC-4). Havana is 1 hour behind San Juan.
To convert CST to AST, add 1 hours to CST time. For example, CST 9:00 AM = AST 10:00 AM.
Key Facts
- •Time difference: Havana (UTC-5) is 1 hour behind San Juan (UTC-4).
- •Daylight Saving Time: Havana observes DST (CST/CDT). San Juan does not observe DST (AST).
- •Regions: Havana is located in Cuba and uses the CST/CDT time zone. San Juan is located in Puerto Rico and uses the AST time zone.
- •Best time to call: The best time to call between Havana and San Juan is 9:00 AM to 3:00 PM in Havana time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Havana and San Juan?
Havana is 1 hour behind San Juan.
What time is it in San Juan when it's 9 AM in Havana?
When it's 9:00 AM in Havana, it is 10:00 AM in San Juan.
What time is 9 PM CST in AST?
9 PM CST (Havana time) is 10:00 PM AST (San Juan 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 Havana and San Juan?
The best time to schedule a meeting is between 9:00 AM to 3:00 PM in Havana 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 CST to AST?
CST (CST/CDT) is the timezone for Havana, Cuba (UTC-5). AST (AST) is the timezone for San Juan, Puerto Rico (UTC-4). Havana is 1 hour behind San Juan. Quick examples: 9 AM CST = 10:00 AM AST, 12 PM CST = 1:00 PM AST, 3 PM CST = 4:00 PM AST, 6 PM CST = 7:00 PM AST.
Is Havana ahead of or behind San Juan?
Havana is 1 hour behind San Juan. When it's noon in Havana, it's 1:00 PM in San Juan.
Does Havana or San Juan change clocks for Daylight Saving Time?
Yes, Havana observes DST and switches between CST/CDT. San Juan does not observe DST — it stays on AST year-round. 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 Havana in San Juan time?
When it is 12:00 PM (noon) in Havana (CST), it is 1:00 PM in San Juan (AST). This is often a popular time for scheduling lunch-hour calls across the Havana–San Juan corridor.
What are the overlapping work hours between Havana and San Juan?
The overlapping work hours between Havana and San Juan are approximately 9:00 AM to 3:00 PM in Havana 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 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.
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.
How do I schedule a call between Havana and San Juan?
To schedule a call between Havana and San Juan, aim for the overlapping window of 9:00 AM to 3:00 PM in Havana time. Use Google Calendar or Calendly with both time zones visible, share the meeting invite with the AST 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 CST / 11:00 AM AST").
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