Time Zone Converter

Time Zone Converter — Free DST-Aware Timezone Tool | CalcNation

Convert time between any two timezones instantly. Supports all IANA timezone names (e.g., America/New_York, Asia/Kolkata, Europe/London). Automatically handles Daylight Saving Time (DST). Shows ISO 8601 format, Unix timestamp, UTC offset, and timezone abbreviation.

What is IST in Time Zone?

IST = Indian Standard Time = UTC+5:30. India does not observe Daylight Saving Time. IANA name: Asia/Kolkata. IST is 5 hours 30 minutes ahead of UTC, 10 hours 30 minutes ahead of New York (EST), and 13 hours 30 minutes ahead of Los Angeles (PST).

What is DST (Daylight Saving Time)?

DST is the practice of advancing clocks by 1 hour during summer months. USA clocks spring forward in March (2nd Sunday) and fall back in November (1st Sunday). European clocks change on the last Sunday of March and October. India, China, Japan, and most of Asia do NOT observe DST.

IST to EST — Time Difference

IST is ahead of EST by 10 hours 30 minutes (11 hours 30 minutes during US DST). If it's 9:00 AM IST, it's 10:30 PM EST the previous day. Use this converter to avoid confusion during US meetings scheduled from India.