HTTP Date Converter
Explicit zones only; reject rolled dates and inconsistent IMF weekdays. Integer milliseconds or up to3 fractional second digits; UTC years0001–9999. Unprefixed numeric magnitude≥1e11 assumes milliseconds, otherwise seconds; use s:/ms: to remove ambiguity. No obsolete HTTP date syntaxes or leap seconds. Taipei formatting uses the browser's Intl data.
Enabling local controls…
Results
Review the settings and run. Editing inputs clears old results.
Processing model and limits
Explicit zones only; reject rolled dates and inconsistent IMF weekdays. Integer milliseconds or up to3 fractional second digits; UTC years0001–9999. Unprefixed numeric magnitude≥1e11 assumes milliseconds, otherwise seconds; use s:/ms: to remove ambiguity. No obsolete HTTP date syntaxes or leap seconds. Taipei formatting uses the browser's Intl data.
Data and model checked: RFC9110 HTTP dates ↗ToolHub source controls ↗
How to use this tool
Load the example, confirm field units and processing rules, then run locally. Editing any input clears the old result. Copy or download the complete output explicitly.
When not to use it
Explicit zones only; reject rolled dates and inconsistent IMF weekdays. Integer milliseconds or up to3 fractional second digits; UTC years0001–9999. Unprefixed numeric magnitude≥1e11 assumes milliseconds, otherwise seconds; use s:/ms: to remove ambiguity. No obsolete HTTP date syntaxes or leap seconds. Taipei formatting uses the browser's Intl data.