Observatory log
New York and Lang Son, compared
- 01Difference now
Lang Son is 11 hours ahead of New York.
New York: EDT (UTC−4) · Lang Son: UTC+7 (UTC+7)
Next changeFrom 1 November 2026: Lang Son is 12 hours ahead of New York.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026+12 h
- 8 March 2026 – 1 November 2026+11 h
- 1 November 2026 – 14 March 2027+12 h
- 14 March 2027 – 7 November 2027+11 h
- 7 November 2027 – 31 December 2027+12 h
Difference of Lang Son from New York. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
Their working days never overlap.
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
09:00–11:00 in New York = 20:00–22:00 in Lang Son
No shared office hours: this is early or late for one side (Mon–Fri).
- 05Weekend
New York: Saturday and Sunday
Lang Son: Saturday and Sunday
24 hours
A day in New York, in Lang Son
| New York | Lang Son | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 11:00 | |
| 01:00 | 12:00 | |
| 02:00 | 13:00 | |
| 03:00 | 14:00 | |
| 04:00 | 15:00 | |
| 05:00 | 16:00 | |
| 06:00 | 17:00 | |
| 07:00 | 18:00 | |
| 08:00 | 19:00 | |
| 09:00 | 20:00 | |
| 10:00 | 21:00 | |
| 11:00 | 22:00 | |
| 12:00 | 23:00 | |
| 13:00 | 00:00Tomorrow | |
| 14:00 | 01:00Tomorrow | |
| 15:00 | 02:00Tomorrow | |
| 16:00 | 03:00Tomorrow | |
| 17:00 | 04:00Tomorrow | |
| 18:00 | 05:00Tomorrow | |
| 19:00 | 06:00Tomorrow | |
| 20:00 | 07:00Tomorrow | |
| 21:00 | 08:00Tomorrow | |
| 22:00 | 09:00Tomorrow | |
| 23:00 | 10:00Tomorrow |
Working hoursEarly or eveningNightWeekend
Questions
Asked about New York and Lang Son
What is the time difference between New York and Lang Son?
Lang Son is 11 hours ahead of New York. This holds until 1 November 2026; then Lang Son is 12 hours ahead of New York.
What is the best time for a call between New York and Lang Son?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 09:00–11:00 in New York = 20:00–22:00 in Lang Son · 2 h.
When does the time difference between New York and Lang Son change?
In the next 12 months it changes on: 1 November 2026 (+12 h); 14 March 2027 (+11 h).