Common time references — and what they actually mean.
3pm ISTAmbiguous — three valid interpretations shown side by side
This cannot be resolved without knowing the sender's location. TimeMeaning flags it as ambiguous and shows all three.
Try this in the tool →9am CST MondayAmbiguous — two valid interpretations
CST spans 14 hours. A morning meeting in Chicago is the middle of the night in Beijing.
Try this in the tool →Noon GMTUnambiguous — 12:00 UTC
GMT is always UTC+0. Unlike BST which shifts seasonally, GMT does not change. This is one of the few unambiguous timezone expressions.
Try this in the tool →Next Friday at 3pm ESTFriday 7 March 2026 at 15:00 Eastern Standard Time (UTC-5) = 20:00 UTC
'Next Friday' interpreted as the upcoming Friday from today's date. EST interpreted as Eastern Standard Time (US), not Australian Eastern Standard Time.
Try this in the tool →Tomorrow morning GMTPartial — 'morning' is ambiguous without a specific time
'Morning' is not a precise time. TimeMeaning resolves the date but flags 'morning' as unresolved — it could mean anything from 06:00 to 12:00.
Try this in the tool →End of day Thursday CETThursday at 17:00 CET (UTC+1 in winter, UTC+2 in summer — DST-dependent)
'End of day' conventionally means 17:00 but is not universal. Some organisations use 18:00 or local business close time.
Try this in the tool →1741381200Friday 7 March 2025 at 20:00:00 UTC
Unix timestamps are unambiguous but require conversion to be human-readable.
Try this in the tool →2026-03-10T14:30:00ZTuesday 10 March 2026 at 14:30 UTC — fully unambiguous
ISO 8601 with Z suffix is the gold standard. No assumptions required.
Try this in the tool →2026-03-10T14:30:00-05:00Tuesday 10 March 2026 at 14:30 Eastern Standard Time = 19:30 UTC
ISO 8601 with explicit UTC offset. Unambiguous — the offset is stated, not inferred.
Try this in the tool →2:30am on March 8 2026 (US Eastern)Ghost time — this moment did not exist
When US clocks spring forward on 8 March 2026, time jumps from 01:59 to 03:00. 02:30 on this date in Eastern time never occurred.
Try this in the tool →December 30 2011 in SamoaGhost date — this date was skipped by government decree
Samoa skipped this date entirely when moving across the International Date Line.
Try this in the tool →1200Z12:00 UTC — fully unambiguous
Zulu time. Used in aviation, military, and meteorology. Z always means UTC.
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