
Exact time synced with atomic clocks (IANA + NTP)
Sunday, April 5, 2026
India · Asia/Kolkata · GMT+5:30
Kolkata is 1.5h behind Hanoi

Exact time synced with atomic clocks (IANA + NTP)
Sunday, April 5, 2026
India · Asia/Kolkata · GMT+5:30

Exact time synced with atomic clocks (IANA + NTP)
Monday, April 6, 2026
Vietnam · Asia/Ho_Chi_Minh · GMT+7
If you are scheduling a call between Kolkata and Hanoi, the overlap window is limited to typical business hours. When it is 9 am in Kolkata it is 10 am in Hanoi — a workable window for scheduling. The latest reasonable overlap is around 3 pm in Kolkata (5 pm in Hanoi). Outside this window there is effectively no good overlap for regular office hours.
Scheduling a family call between Kolkata and Hanoi takes a little planning. Kolkata is 1.5 hours behind Hanoi, which means there's no window that feels comfortable for everyone at the same time. The most manageable option is early evening in Kolkata — around 7 pm — which puts Hanoi at 8:30 pm. Someone will need to stretch a little, but at least no one's setting a middle-of-the-night alarm. Weekends tend to give the most flexibility if you can agree on a time in advance.
No holiday data available for this country.
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Reunification Day
Ngày Giải phóng miền Nam, thống nhất đất nước
Labour Day
Ngày Quốc tế lao động
National Day
Quốc khánh
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Data via sunrisesunset.io
Data via Open-Meteo · Updates every 30 min