Day-of-Week with Dates
When a weekday accompanies a date, capitalize the weekday and follow the date order and punctuation of the chosen style. Microsoft prefers spelling weekday names out in running text and reserves abbreviations for space-constrained contexts.
Capitalize weekday names; spell them out in ordinary prose unless space is tight, then apply the date punctuation required by your chosen style.
Key details
Important caveats
Style Boundary
The comma/order around the accompanying date follows the selected date style rather than a universal English sequence.
Weekday Boundary
Weekday names are proper-name-like calendar labels and are capitalized; Microsoft advises against abbreviating them unless space is limited.
Further guidance
Practical Application
Capitalize weekday names, decide whether the weekday is necessary, and then apply the punctuation/order rules of the document’s date style. Do not mix US and day-month conventions within the same document.
Reader Check
Is the weekday-date combination clear, internally consistent, and formatted according to one chosen date style?
Worked Example
A US-style sentence may read “Monday, September 28, 2026,” while a day-month house style may use “Monday 28 September 2026”; keep one convention consistently.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Date and time terms — Microsoft Style Guide (opens in a new tab)Microsoft · Official Microsoft house-style guidance for dates and times, including date ordering and formatting examples.