Standard year-round offset: Dublin is 5 hours ahead of New York in both winter (EST UTC-5 → GMT UTC+0) and summer (EDT UTC-4 → IST UTC+1). When it is 9:00 AM in New York, it is 2:00 PM GMT/IST in Dublin. Best meeting window: 9:00 AM – 12:00 PM EST/EDT in New York (2:00 PM – 5:00 PM GMT/IST in Dublin — Golden 9–5 Overlap).
The standard baseline difference between New York (United States) and Dublin (Ireland) is 5 hours (Dublin ahead of New York) in both winter (EST UTC-5 vs. GMT UTC+0) and summer (EDT UTC-4 vs. IST UTC+1). Because United States and Ireland change Daylight Saving clocks on different Sundays, the offset temporarily shifts to 4 hours during a 14-day spring gap (Mar 14, 2027 – Mar 28, 2027) and 2-day autumn gap (Oct 31, 2027 – Nov 2, 2027).
| Date Window | Duration | Active Zones | Time Difference | Regime |
|---|---|---|---|---|
| Since Nov 1, 2026 | 133 days | EST (UTC-5) → GMT (UTC+0) | 5 hours | Standard Alignment (Active Now) |
| Mar 14, 2027 – Mar 28, 2027 | 14 days | EDT (UTC-4) → GMT (UTC+0) | 4 hours | ⚠️ DST Desync Window |
| Mar 28, 2027 – Oct 31, 2027 | 217 days | EDT (UTC-4) → IST (UTC+1) | 5 hours | Standard Alignment |
| Oct 31, 2027 – Nov 2, 2027 | 2 days | EDT (UTC-4) → GMT (UTC+0) | 4 hours | ⚠️ DST Desync Window |
At the standard 5 hours offset (EST/EDT to GMT/IST), New York and Dublin share 3 hours/day of simultaneous 9:00 AM – 5:00 PM business hours: 9:00 AM – 12:00 PM EST/EDT in New York equals 2:00 PM – 5:00 PM GMT/IST in Dublin.
Both New York (EST/EDT) and Dublin (GMT/IST) are simultaneously inside 9:00 AM – 5:00 PM core working hours (3h/day year-round).
Covers 15 hours/day when either New York (EST/EDT) or Dublin (GMT/IST) is outside 7:00 AM – 9:00 PM local time.
Because Dublin is 5 hours ahead of New York, Dublin crosses midnight into the next calendar day (+1 day) at 7:00 PM EST/EDT in New York. From 12:00 AM to 7:00 PM EST/EDT in New York, both locations are on the same weekday; from 7:00 PM EST/EDT to 11:59 PM in New York, Mon–Fri in New York maps to Tue–Sat in Dublin.
Weekend & Workday Alignment: Friday evening in New York after 7:00 PM EST/EDT crosses into Saturday morning in Dublin (Dublin's Sat–Sun weekend), while Monday early morning in Dublin before 5:00 AM GMT is still Sunday in New York (New York's Sat–Sun weekend). Daytime meetings before 7:00 PM EST/EDT in New York stay on the same Monday–Friday weekday in both cities.
Geographically, New York (United States, 40.71°N, 74.01°W, IATA: JFK/EWR/LGA) and Dublin (Ireland, 53.35°N, 6.26°W, IATA: DUB) are separated by a great-circle distance of 5,115 km (3,178 miles, approximately 6.5h non-stop flight). By longitude, true solar time in Dublin is 4 hours and 31 minutes ahead of New York (a 29-minute divergence from the 5 hours standard civil clock offset): New York (40.71°N, 74.01°W) sits 0.99° east of the 75.0°W EST reference meridian, so mean solar noon occurs at 11:56 AM EST in winter and 12:56 PM EDT in summer, while Dublin (53.35°N, 6.26°W) sits 6.26° west of the 0.0°E GMT reference meridian, so mean solar noon occurs at 12:25 PM GMT in winter and 1:25 PM IST in summer.
For New York → Dublin: India Standard Time (IST, UTC+5:30) is a single national half-hour offset observed year-round across all of India (IANA zone Asia/Kolkata) with no Daylight Saving Time. Note: Neighboring Sri Lanka shares the same UTC+5:30 offset year-round under its own IANA timezone (Asia/Colombo, Sri Lanka Standard Time / SLST).
| Abbreviation Meaning | UTC Offset | IANA Zone | Major Cities & Regions |
|---|---|---|---|
| India Standard Time Primary Here | UTC+5:30 (year-round, no DST) | Asia/Kolkata | Not used for New York → Dublin: Mumbai, New Delhi, Bengaluru, Hyderabad, Chennai, Pune (India) |
| Irish Standard Time Primary Here | UTC+1 (summer only; GMT UTC+0 in winter) | Europe/Dublin | Active on New York → Dublin: Dublin, Cork, Galway (Ireland) |
| Israel Standard Time | UTC+2 (IDT UTC+3 in summer) | Asia/Jerusalem | Not used for New York → Dublin: Tel Aviv, Jerusalem (Israel) |
| New York Time | Dublin (Standard (EST/EDT → GMT/IST)) | Day Shift | Call Status |
|---|---|---|---|
| 9:00 AM EST/EDT (Morning Start) | 2:00 PM GMT/IST | Same day | Working Overlap (9–5) |
| 12:00 PM EST/EDT (Midday / Noon) | 5:00 PM GMT/IST | Same day | Shoulder Hours |
| 3:00 PM EST/EDT (Afternoon) | 8:00 PM GMT/IST | Same day | Shoulder Hours |
| 6:00 PM EST/EDT (Evening Wrap-up) | 11:00 PM GMT/IST | Same day | Late evening / night |
| New York (EST) | Dublin (Standard (EST/EDT → GMT/IST)) | Day (Dublin) | Availability (New York ↔ Dublin) |
|---|---|---|---|
| 12:00 AM EST/EDT in New York | 5:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 1:00 AM EST/EDT in New York | 6:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 2:00 AM EST/EDT in New York | 7:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 3:00 AM EST/EDT in New York | 8:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 4:00 AM EST/EDT in New York | 9:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 5:00 AM EST/EDT in New York | 10:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 6:00 AM EST/EDT in New York | 11:00 AM GMT/IST in Dublin | Same day | New York–Dublin Overnight |
| 7:00 AM EST/EDT in New York | 12:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 8:00 AM EST/EDT in New York | 1:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 9:00 AM EST/EDT in New York | 2:00 PM GMT/IST in Dublin | Same day | New York–Dublin 9–5 |
| 10:00 AM EST/EDT in New York | 3:00 PM GMT/IST in Dublin | Same day | New York–Dublin 9–5 |
| 11:00 AM EST/EDT in New York | 4:00 PM GMT/IST in Dublin | Same day | New York–Dublin 9–5 |
| 12:00 PM EST/EDT in New York | 5:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 1:00 PM EST/EDT in New York | 6:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 2:00 PM EST/EDT in New York | 7:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 3:00 PM EST/EDT in New York | 8:00 PM GMT/IST in Dublin | Same day | New York–Dublin Shoulder |
| 4:00 PM EST/EDT in New York | 9:00 PM GMT/IST in Dublin | Same day | New York–Dublin Late evening / night |
| 5:00 PM EST/EDT in New York | 10:00 PM GMT/IST in Dublin | Same day | New York–Dublin Late evening / night |
| 6:00 PM EST/EDT in New York | 11:00 PM GMT/IST in Dublin | Same day | New York–Dublin Late evening / night |
| 7:00 PM EST/EDT in New York | 12:00 AM GMT/IST in Dublin | +1 day | New York–Dublin Overnight |
| 8:00 PM EST/EDT in New York | 1:00 AM GMT/IST in Dublin | +1 day | New York–Dublin Overnight |
| 9:00 PM EST/EDT in New York | 2:00 AM GMT/IST in Dublin | +1 day | New York–Dublin Overnight |
| 10:00 PM EST/EDT in New York | 3:00 AM GMT/IST in Dublin | +1 day | New York–Dublin Overnight |
| 11:00 PM EST/EDT in New York | 4:00 AM GMT/IST in Dublin | +1 day | New York–Dublin Overnight |
The standard time difference is 5 hours (Dublin ahead of New York) in both winter (EST → GMT) and summer (EDT → IST). It temporarily shifts to 4 hours during the 14-day spring gap (Mar 14, 2027 – Mar 28, 2027) and 2-day autumn gap (Oct 31, 2027 – Nov 2, 2027).
No — at 4:00 PM EST/EDT in New York, it is 9:00 PM GMT/IST (same day) in Dublin, which is after the 9:00 PM evening cutoff. Schedule earlier during 9:00 AM – 12:00 PM EST/EDT (2:00 PM – 5:00 PM GMT/IST in Dublin).
Aim for 9:00 AM – 12:00 PM EST/EDT in New York, which is 2:00 PM – 5:00 PM GMT/IST in Dublin (3h/day of 9–5 overlap). Avoid calling between 4:00 PM – 7:00 AM EST/EDT (+1 day) in New York (9:00 PM – 12:00 PM GMT/IST (+1 day) in Dublin), when at least one city is outside 7:00 AM – 9:00 PM.
New York: Sun, Mar 14, 2027 (EST → EDT, new gap: 4 hours (EDT UTC-4 vs GMT UTC+0)). Dublin: Sun, Mar 28, 2027 (GMT → IST, new gap: 5 hours (IST UTC+1 vs EDT UTC-4)).
Year-round under standard alignment, 9:00 AM in New York is 2:00 PM GMT/IST in Dublin, and 12:00 PM (noon) in New York is 5:00 PM GMT/IST in Dublin.