San Juan to Moscow Time

San Juan (Puerto Rico) is a US territory with pharmaceutical and tech manufacturing, with key industries in pharmaceuticals, medical devices, electronics, and tourism. Moscow (Russia) is one of the world's largest economies spanning 11 time zones, known for oil and gas, mining, defense, agriculture, and IT. With a 7-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 Moscow

The 7-hour difference between San Juan and Moscow requires careful scheduling. The best overlap window is typically 2–4 hours when both cities are within working hours. Puerto Rican business hours are typically 8 AM–5 PM, with a bilingual (English/Spanish) workforce. Russian business hours are typically 9 AM–6 PM, with Moscow as the primary business hub and a growing tech sector. Teams often designate specific "overlap hours" for real-time collaboration and use asynchronous communication (Slack, email, recorded video) for the rest of the day.

Daylight Saving Time Considerations

Neither San Juan nor Moscow observes Daylight Saving Time — San Juan stays on AST and Moscow stays on MSK year-round. This makes scheduling between these two cities simpler, as the 7-hour time difference remains constant throughout the year with no DST surprises.

Collaboration Tools & Workflow

With a 7-hour time difference, San Juan and Moscow teams operate in a near "follow-the-sun" model. When one team logs off, the other picks up — enabling near-24-hour productivity on shared projects. The key challenge is handoff quality: teams should document decisions in shared tools (Notion, Confluence, Linear), record video updates with Loom, and write thorough pull request descriptions. Weekly all-hands meetings require someone to take an early morning or late evening call, so the best practice is to rotate this burden fairly between San Juan and Moscow.

Remote Work Between San Juan & Moscow

San Juan, a key city in Puerto Rico, and Moscow, a key city in Russia, represent a common corridor for distributed teams navigating a 7-hour time difference. Remote workers and freelancers operating between these cities should plan their day around the overlap window — typically the late morning for one city and early morning or late afternoon for the other. Using a world clock widget, setting Slack status with local time, and blocking "no-meeting" deep work hours outside the overlap are essential practices for productive cross-timezone remote collaboration between San Juan and Moscow.

AST (AST) stands for the timezone used in San Juan, Puerto Rico (UTC-4). MSK (MSK) is the timezone used in Moscow, Russia (UTC+3). San Juan is 7 hours behind Moscow.

To convert AST to MSK, add 7 hours to AST time. For example, AST 9:00 AM = MSK 4:00 PM.