Current Time in IST
Irish Standard Time
About IST Irish Standard Time
Uniquely, Irish Standard Time (IST) is used during the summer months in Ireland, making it a daylight saving time. During winter, Ireland uses Greenwich Mean Time (GMT), which is UTC+00:00. So IST is effectively Ireland's summer time.
UTC Offset: +01:00
IST at a glance
| Right now | 18:49 on Tuesday |
|---|---|
| UTC offset | UTC+01:00 (1 hour ahead of UTC) |
| Full name | Irish Standard Time |
| Countries | 1 |
| IANA zones | 2 |
What is IST?
IST is a time zone that is currently UTC+01:00 - that's 1 hour ahead of UTC. Its full name is Irish Standard Time. Right now the local time on IST is 18:49. Today 1 country (including Ireland) and 2 IANA database zones sit at this offset, which is why IST is a useful shorthand even though the exact local rules differ from place to place.
How to convert IST to UTC
For quick planning, use today's offset as a rule of thumb: 12:00 UTC = 13:00 local time, and 09:00 local time = 08:00 UTC. The live clock above is the safest reference when daylight saving or regional rules may apply.
Which countries use IST?
IST is used across Ireland. Open a country to see all of its cities and their local time.
IANA time zones in IST
IST maps to the IANA database zones Eire and Europe/Dublin. Each zone page shows its exact rules, including any daylight saving changes.
💡 Tip: Comparing times? IST is 1 hour ahead of UTC. Use the IANA links and country links on this page when you need the exact local rule for a real place, not just the offset.
IST - Frequently asked questions
What is IST?
IST is a time zone currently UTC+01:00 (1 hour ahead of UTC). Its full name is Irish Standard Time.
What is the UTC offset of IST?
IST is UTC+01:00 right now - 1 hour ahead of UTC.
Which countries are on IST?
IST is used in Ireland.
What time is it in IST now?
The current time on IST is 18:49 on Tuesday. The clock above updates every second.
How Alarm.now explains IST
Abbreviation, offset, and IANA zones
IST is shown as a time-zone group for Irish Standard Time with offset +01:00. The page links the abbreviation to the IANA zones and countries that use it, so users and search engines can distinguish a short label from an exact time-zone rule set.
When to use a specific IANA page
Use this group page for an overview of the abbreviation and offset. Use a linked IANA time-zone page when you need exact daylight-saving rules for a calendar, app, or future-date comparison.