The Case Correction
Google Docs is equipped with an aggressive autocorrect engine designed to fix common typographical errors as you type. One of its specific rules is to ensure that proper nouns are capitalized. Consequently, if you type a day of the week—like “monday” or “friday”—in all lowercase letters, the moment you press the spacebar, Google Docs will automatically capitalize the first letter. While this is grammatically correct for standard prose, it can be infuriating if you are writing code, drafting specific legal formatting, or styling a creative document where you intentionally want the days of the week to remain in lowercase.
Editing the Substitution List
To retain full control over your capitalization and stop Google Docs from automatically capitalizing the days of the week, you must remove those specific words from the active autocorrect substitution dictionary.
Open your Google Docs document. Navigate to the top menu bar and click on Tools. From the drop-down menu, select Preferences. A dialogue box will appear with two tabs at the top; click on the Substitutions tab. This tab displays a long list of automatic replacements. Scroll down this list until you find the entries for the days of the week (you will see “monday” in the left column set to be replaced by “Monday” in the right column, and so on). You cannot simply uncheck the master substitution toggle without breaking all other autocorrect features. Instead, hover your mouse over the specific row for “monday” and click the small ‘X’ that appears on the far right side of that row to delete the rule entirely. Repeat this process for all seven days of the week, then click the blue OK button.