17:27
MAYBE
Checking your clock…
Check the holiday calendar before you check the offset for Buffalo. Lake-effect days scramble standups. On clear days, Eastern 08:00–17:00 is the rule. On ordinary weekdays, The polite window around Downtown Buffalo is 08:00–17:00 local. Buffalo still shifts with daylight saving (UTC−5 in January, UTC−4 in July). A calendar hold with both local times beats a surprise mention. Midwinter sunsets still arrive before dinner, which makes late Slack feel later than the clock.
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Buffalo is 17:27. Verdict: MAYBE. Check before you ping → https://asleep.today/buffalo