Resource 4: Units of time

 Teacher resource for planning or adapting to use with pupils

Time

  • 1 minute = 60 seconds
  • 1 hour = 60 minutes
  • 1 day = 24 hours
  • 1 week = 7 days
  • 1 fortnight = 14 days
  • 1 year = 12 months = 52 weeks = 365 days
  • leap year = 366 days

Many timetables and digital watches use the 24-hour clock time.

Use this scale to change between 12-hour and 24-hour time.

6:15 am → 06:15

6:15 pm → 18:15

Remember:

  • a.m. is morning time (it comes from the Latin ante meridium, meaning 'before midday');
  • p.m. is afternoon and evening time (it comes from the Latin post meridium, meaning 'after midday');
  • the 24-hour clock always uses four digits.

Here is a way to remember how many days there are in each month.

  • All the 'knuckle' months have 31 days.
  • February has 28 days (29 in a leap year). April, June, September and November have 30 days.

Resource 3: Sundials

Section 3: Discussing data