About This Time Conversion

This page converts the local time between Karachi, Pakistan (timezone Asia/Karachi, currently ++5, GMT+5) and San Juan, Puerto Rico (timezone America/Puerto_Rico, currently --4, GMT-4). TZSync uses the IANA timezone database so conversions always account for Daylight Saving Time, half-hour offsets such as India (UTC+5:30), and quarter-hour offsets such as Nepal (UTC+5:45).

When it is daytime in Karachi, the clock in San Juan reads a different hour, and possibly a different calendar day. Drag the time slider on this page to find an overlap where both cities are inside typical working hours (9 AM – 5 PM local time) — that overlap is your best window for meetings, calls, and collaboration between Karachi and San Juan.

Quick Facts

• Population of Karachi: 16,094,000.
• Population of San Juan: 418,140.
• Both cities follow their local IANA timezone rules maintained by the Internet Assigned Numbers Authority.
• DST transitions can temporarily shift the offset between these cities by one hour.