IST to PST converter
California is 13½ hours behind India in winter and 12½ hours behind in summer. The whole of a West Coast working day happens while India sleeps.
Los Angeles is 13 hours 30 minutes behind India in winter and 12 hours 30 minutes behind in summer.
India and the US West Coast
California, Seattle and the rest of the Pacific coast are about as far from India on the clock as anywhere gets. For people in India that means night shifts, late calls and deadlines that arrive a day later than they look.
Working Pacific hours from India
Support and engineering teams serving West Coast clients work what is effectively a graveyard shift.
- 9 AM–5 PM Pacific, Nov–Mar = 10:30 PM–6:30 AM IST
- 9 AM–5 PM Pacific, Mar–Nov = 9:30 PM–5:30 AM IST
- The US Friday ends at 6:30 AM on Saturday in India (winter)
Teams that cover both US coasts often split the night: the East Coast block first, from around 7:30 PM IST, and a West Coast block that runs past dawn.
Calling family in California
Two slots work: early in your morning or late in your evening.
- India 7–9 AM = California’s previous evening, 5:30 PM–7:30 PM (winter) or 6:30 PM–8:30 PM (summer)
- India 9–11 PM = California’s morning, 7:30 AM–9:30 AM (winter) or 8:30 AM–10:30 AM (summer)
An Indian Sunday morning call reaches California on Saturday evening, which suits most families on both ends.
US university and job deadlines
Many US applications close at 11:59 PM in the school’s own time zone, and West Coast schools use Pacific time.
- 11:59 PM PST = 1:29 PM IST the next day (most winter deadlines)
- 11:59 PM PDT = 12:29 PM IST the next day
- An East Coast school’s 11:59 PM EST is earlier: 10:29 AM IST the next day
Always check which zone the portal means. Submitting by midnight IST on the printed date is the safe habit.
Tech launches from California
Silicon Valley keynotes are timed for a Pacific morning, which is a late night in India.
- A 10 AM PDT keynote = 10:30 PM IST
- A 10 AM PST event in winter = 11:30 PM IST
- Sales and drops at midnight Pacific = 12:30 PM IST (summer)
Why California is so much harder than New York
From India, the US East Coast still shares a sliver of the day: New York’s 9 AM is 7:30 PM IST in winter, a late but workable evening. California is three hours further back. Its 9 AM is 10:30 PM IST, and its afternoon is India’s small hours.
That is why teams in Bengaluru or Hyderabad that work with both coasts tend to schedule East Coast meetings first thing in their evening and leave West Coast calls for one fixed slot late at night, or push them to the Californian evening, which is India’s next morning.
The two weekends your schedule shifts
India never changes its clocks; California does, on the second Sunday of March and the first Sunday of November. For anyone in India working to Pacific hours, the shift arrives on the Monday after.
India to the US West Coast, all 24 hours
The first California column applies from early November to mid-March, the second from mid-March to early November. Highlighted: your early morning and late evening, the two slots that catch California awake.
| India (IST) | Los Angeles, PST−13:30 | Los Angeles, PDT−12:30 |
|---|---|---|
| 12:00 AM (midnight) | 10:30 AM prev. day | 11:30 AM prev. day |
| 1:00 AM | 11:30 AM prev. day | 12:30 PM prev. day |
| 2:00 AM | 12:30 PM prev. day | 1:30 PM prev. day |
| 3:00 AM | 1:30 PM prev. day | 2:30 PM prev. day |
| 4:00 AM | 2:30 PM prev. day | 3:30 PM prev. day |
| 5:00 AM | 3:30 PM prev. day | 4:30 PM prev. day |
| 6:00 AM | 4:30 PM prev. day | 5:30 PM prev. day |
| 7:00 AM | 5:30 PM prev. day | 6:30 PM prev. day |
| 8:00 AM | 6:30 PM prev. day | 7:30 PM prev. day |
| 9:00 AM | 7:30 PM prev. day | 8:30 PM prev. day |
| 10:00 AM | 8:30 PM prev. day | 9:30 PM prev. day |
| 11:00 AM | 9:30 PM prev. day | 10:30 PM prev. day |
| 12:00 PM (noon) | 10:30 PM prev. day | 11:30 PM prev. day |
| 1:00 PM | 11:30 PM prev. day | 12:30 AM |
| 2:00 PM | 12:30 AM | 1:30 AM |
| 3:00 PM | 1:30 AM | 2:30 AM |
| 4:00 PM | 2:30 AM | 3:30 AM |
| 5:00 PM | 3:30 AM | 4:30 AM |
| 6:00 PM | 4:30 AM | 5:30 AM |
| 7:00 PM | 5:30 AM | 6:30 AM |
| 8:00 PM | 6:30 AM | 7:30 AM |
| 9:00 PM | 7:30 AM | 8:30 AM |
| 10:00 PM | 8:30 AM | 9:30 AM |
| 11:00 PM | 9:30 AM | 10:30 AM |
“prev. day”: California has not reached India’s date yet.
Quick answers
At 10 PM in India, what time is it in California?
8:30 AM PST in winter or 9:30 AM PDT in summer, on the same date: the start of the Californian workday.
What are US West Coast shift timings in IST?
A 9 AM to 5 PM Pacific shift is 10:30 PM to 6:30 AM IST from November to March and 9:30 PM to 5:30 AM IST from March to November.
When is 11:59 PM PST in India?
1:29 PM IST on the following day. During daylight time, 11:59 PM PDT is 12:29 PM IST the following day.
What time is a 10 AM Pacific tech event in India?
10:30 PM IST when California is on daylight time (spring to autumn), or 11:30 PM IST in winter.
Is California 12.5 or 13.5 hours behind India?
13.5 hours from early November to mid-March and 12.5 hours from mid-March to early November. The change comes from the US; India stays on UTC+5:30.
Why does my US West Coast shift start an hour earlier in March?
Because California moves its clocks forward on the second Sunday of March while India does not. The Pacific start time stays the same, so on the Indian clock it arrives an hour sooner.