4 AM BST to EST
4:00 AM GMT is 11:00 PM EST (previous day).
4 AM BST in other time zones
Quarter hours: 4 AM, 4:15, 4:30 and 4:45 BST
- 4:00 AM GMT = 11:00 PM EST (previous day)
- 4:15 AM GMT = 11:15 PM EST (previous day)
- 4:30 AM GMT = 11:30 PM EST (previous day)
- 4:45 AM GMT = 11:45 PM EST (previous day)
4 AM BST to EST FAQ
What is 4 AM BST in EST?
4:00 AM GMT is 11:00 PM EST (previous day).
Is 4 AM BST the same day in EST?
No. 4:00 AM GMT is 11:00 PM EST on the previous day.
What is 4:30 AM BST in EST?
4:30 AM GMT = 11:30 PM EST (previous day).
Is 4 AM ET the same as 4 AM EST?
ET (Eastern Time) is the year-round name for these clocks, so 4 AM ET means 4 AM EST on today's date. 4:00 AM GMT is 11:00 PM EST (previous day).
Related conversions
All BST to EST times
12 AM BST to EST1 AM BST to EST2 AM BST to EST3 AM BST to EST4 AM BST to EST5 AM BST to EST6 AM BST to EST7 AM BST to EST8 AM BST to EST9 AM BST to EST10 AM BST to EST11 AM BST to EST12 PM BST to EST1 PM BST to EST2 PM BST to EST3 PM BST to EST4 PM BST to EST5 PM BST to EST6 PM BST to EST7 PM BST to EST8 PM BST to EST9 PM BST to EST10 PM BST to EST11 PM BST to EST
Convert EST to BST
Convert BST to other time zones
Convert other time zones to EST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.