How to Stop Microsoft Word from Automatically Capitalizing Days of the Week

Microsoft Word includes an aggressive AutoCorrect engine that assumes you are always writing standard English prose. Because days of the week (Monday, Tuesday, etc.) are proper nouns in English, Word is hardcoded to automatically capitalize them. If you type “monday” and press the spacebar, Word will instantly change it to “Monday.”

While this is helpful for standard business letters, it is infuriating if you are writing code snippets, building database schemas, or writing poetry where you intentionally want the days of the week to be strictly lowercase. Having the application constantly override your deliberate keystrokes ruins your workflow and forces you to continually press Ctrl+Z to undo the automation.

You can easily disable this specific grammar rule to regain total control over your capitalization.

How to Disable Automatic Day Capitalization

This rule is buried within the AutoCorrect exceptions menu.

1. Open your document in Microsoft Word.
2. Click on File in the top-left corner of the ribbon.
3. Click on Options at the bottom of the left sidebar.
4. In the Word Options window, select Proofing from the left-hand navigation pane.
5. Click the AutoCorrect Options… button in the main pane.
6. A new dialog box will open. Ensure you are on the AutoCorrect tab.
7. Look through the list of checkboxes at the top of the window.
8. Find and uncheck the box labeled Capitalize names of days.
9. (Optional) If you also want to stop Word from capitalizing the very first word in a sentence, uncheck Capitalize first letter of sentences as well.
10. Click OK twice to close both windows and save your changes.

Word will immediately respect your capitalization choices. If you type “friday”, it will permanently remain as “friday” without any automatic corrections.