Time systems, calendar references, and timezone tools.

Time-zone reference

IST

India Standard Time is the single national time standard used across India, with a half-hour offset from UTC.

What this abbreviation usually means

This page focuses on the Indian meaning of IST because the same abbreviation is used elsewhere for different zones.

Reference offset

IST is commonly associated with UTC+5:30. The current IANA reference on this page resolves to UTC+5:30 right now.

Representative locations

Mumbai, Delhi, Bengaluru are the places most readers expect when they search for this abbreviation.

DST handling

This zone is typically treated as a fixed year-round reference without a daylight-saving jump.

Best next step

Use the dedicated converter when you need to translate a specific meeting or timestamp between this zone and another one.

Compare IST with related zones

These are the abbreviations people most often compare against this reference.

UTC Open the UTC reference page and compare it directly with IST. JST Open the JST reference page and compare it directly with IST. GMT Open the GMT reference page and compare it directly with IST. Timezone Converter Convert a specific date and time between IST and any other major world zone.