Seconds in a minute: 60
Minutes in an hour: 60
Seconds in an hour: 3,600
Hours in a day: 24
Minutes in a day: 1,440
Seconds in a day: 86,400
Days in a week: 7
Days in a year: 365
Days in a leap year: 366
Weeks in a year: 52 (plus 1 or 2 days)
Months in a year: 12
Years in a decade: 10
Years in a century: 100
Years in a millennium: 1,000
Months with 31 days: January, March, May, July, August, October, December
Months with 30 days: April, June, September, November
Days in February: 28, or 29 in a leap year
Knuckle trick for month lengths: Knuckles are 31-day months, valleys between are shorter months
Leap year rule: Every 4 years, except century years not divisible by 400
Is 2000 a leap year?: Yes
Is 1900 a leap year?: No
Is 2028 a leap year?: Yes
Is 2026 a leap year?: No
Order of the days of the week: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday
Order of the months: January through December
Seasons in order (northern hemisphere): Winter, spring, summer, fall
Quarter past 3: 3:15
Half past 7: 7:30
Quarter to 9: 8:45
Ten minutes to 6: 5:50
Meaning of a.m.: From midnight to just before noon
Meaning of p.m.: From noon to just before midnight
12:00 a.m. is: Midnight
12:00 p.m. is: Noon
3:00 p.m. in 24-hour time: 15:00
18:30 in 12-hour time: 6:30 p.m.
00:00 in 12-hour time: 12:00 a.m. (midnight)
Elapsed time from 2:15 to 4:45: 2 hours 30 minutes
Elapsed time from 9:40 a.m. to 11:10 a.m.: 1 hour 30 minutes
Time 45 minutes after 3:30: 4:15
Time 2 hours before 1:00 p.m.: 11:00 a.m.
Minutes in 2 and a half hours: 150
Hours in 3 days: 72
Hours in a week: 168
Minutes in a quarter hour: 15
Convert 90 minutes to hours: 1.5 hours
Convert 2 hours to seconds: 7,200
Convert 3 weeks to days: 21
Convert 18 months to years: 1.5 years
Fortnight: Two weeks (14 days)
Biweekly: Every two weeks
Semester: Half of a school year
Which hand moves faster, hour or minute?: Minute hand
How far does the minute hand move in 5 minutes?: From one number to the next (30 degrees)
Degrees the minute hand turns in an hour: 360
Time zone: A region that shares the same standard time
Number of time zones in the contiguous US: Four: Eastern, Central, Mountain, Pacific
Greenwich Mean Time (GMT): Time at the 0 degree longitude line through Greenwich, England
Calendar year starts and ends: January 1 to December 31
BCE and CE: Before Common Era and Common Era, used to number years
Digital vs. analog clock: Digital shows numbers; analog uses hands on a dial

Free flashcards from Peabody at peabody.kids/flashcards/math-time