Istanbul and San Juan Time Zone Comparison
Istanbul and San Juan are two major cities that sit in noticeably different time zones. Istanbul is Turkey's largest city and historic capital, uniquely straddling Europe and Asia across the Bosphorus strait. San Juan, the capital of Puerto Rico, is a historic port city with one of the oldest Spanish settlements in the Caribbean.
San Juan is always 7 hours behind Istanbul, with no seasonal change, since neither city's daylight saving rules shift this relationship.
With a gap this large, business hours barely overlap between Istanbul and San Juan — an early morning or a late evening on one side is usually needed to connect with the other.