A date matters as much as the city. New York and London do not always change their clocks on the same weekend. A meeting that was five hours apart can temporarily be four hours apart.
Enter the event date, not today’s date. Use America/New_York and Europe/London rather than abbreviations such as EST or BST. Named zones carry historical rules; a fixed UTC offset does not.
On 8 March 2026, 02:30 in New York does not exist. The converter rejects it instead of silently moving it to 03:30. Choose a real local time and ask the participants to confirm.
On 1 November 2026, 01:30 in New York occurs twice. The earlier occurrence is 05:30 UTC and the later one is 06:30 UTC. The repeated-hour choice is necessary to identify the instant.
Check the UTC offset on each result card. Recalculate important future meetings if a country announces a rule change. Yelya relies on the server’s installed time zone database.