Free Printable Military Time Worksheets for Year 3

Military time is often introduced in 3rd or 4th grade. In 3rd grade, students are mastering telling time to the nearest minute, making it a logical time to introduce the 24-hour clock as an alternative system.

Focus on the basic conversion rule. Explain that morning hours (AM) look similar (e.g., 8:30 AM is 0830), but for afternoon hours (PM), you add 12. Use a simple T-chart to show side-by-side examples, like 1:00 PM = 1300, 2:00 PM = 1400, and so on.

At this level, focus on direct conversion. Use matching exercises that pair analog clocks with the correct military time. Simple fill-in-the-blank questions where students convert a given 12-hour time to 24-hour format are also very effective for building foundational skill.

The most frequent mistake is forgetting to add 12 to PM hours. A student might see 4:00 PM and incorrectly write it as 0400 instead of 1600. Consistent practice with the '+12' rule for PM hours is the best way to correct this.

You can assign this worksheet as an interactive digital activity on Wayground or as a printable PDF. The digital format provides immediate feedback, which is great for independent practice. All worksheets, whether digital or printed, come with a full answer key to help you or your students check their work.

This topic extends the Common Core focus for 3rd grade, which includes telling and writing time to the nearest minute. After students are comfortable with the 12-hour clock, introducing the 24-hour system challenges them to apply their understanding of time in a new context and builds a stronger number sense around the 24 hours in a day.