The common core standard 1.MD.B.3 states that firstgrade students should be able to tell and write time in hours and halfhours using analog and digital clocks.
To meet this standard, students should be able to:

Read and understand the numbers on an analog clock: Students should be able to identify the numbers 112 on an analog clock and understand that each number represents an hour.

Identify the hour hand and the minute hand on an analog clock: Students should be able to differentiate between the hour hand and the minute hand on an analog clock. They should understand that the hour hand points to the hour and the minute hand points to the minutes.

Tell time to the hour: Students should be able to read the hour on an analog clock and say the time using phrases like â€śone oâ€™clock,â€ť â€śtwo oâ€™clock,â€ť etc.

Tell time to the halfhour: Students should be able to read the hour and the position of the minute hand on an analog clock to determine the halfhour. For example, if the minute hand is pointing at the 6, they should understand that it is halfpast the hour.

Read and understand digital clocks: Students should be able to read and understand digital clocks, which display the time using numbers. They should be able to identify the hour and the minutes displayed on a digital clock.

Write the time using digital format: Students should be able to write the time they read on a digital clock using the correct format, such as 1:00, 2:30, etc.
By the end of first grade, students should have a solid understanding of telling and writing time in hours and halfhours using both analog and digital clocks.