Math · Stage 4
Solve day-of-week and elapsed-day (calendar) problems
The week is a loop of 7, so count the days then take away whole weeks — that is how you find the day-of-week and the number of days between two dates.
✦ Math📘 Stage 4 · S4⏱ ~10 min🧒 Ages 8–9★ Free to start
I can solve day-of-week and elapsed-day (calendar) problems.
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Kavi Counts to the Trip 🧳
Kavi's forest trip is in 10 days and today is Tuesday. "I won't count ten times on my wings," hoots Kavi. "A week is a loop of 7 — so 10 days is one whole week and 3 more. One week lands back on Tuesday, then 3 hops → Friday! 🧳"
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What your child will learn
1The week is a loop of 7The days of the week go round and round — after Sunday you are back at Monday. Tap each day. The big secret: every 7 days you land on the same day again.
2Elapsed days are just hopsTo find how many days from one date to another in the same month, hop along the line and subtract. From the 4th to the 11th: hop from 4 to 11, that is 11 − 4 = 7 days. Tap Hop and count along.
3Sort the months by their lengthTo count days across months you must know how long each month is. Most have 31, four have 30, and February has 28 (or 29 in a leap year). Drop each month in its box →
4Count the sevens, keep the restFor a big jump of days, see how many whole weeks fit — those land on the same day. The lit numbers are the sevens: 7, 14, 21, 28… If the trip is in 10 days, that is 7 + 3: one week (same day) then 3 more hops.
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A peek inside
How many days from March 5 to March 12 (same month)?
later − earlier = 12 − 5
Try this at home: Elapsed days (same month): from the 4th to the 11th = __ (later − earlier)
Ready to play and learn?
Start the free interactive lesson, or print the handout for screen-free play.
Part of Math · Stage 4 · S4 on KAVI Academy — a secular, whole-child learning platform for ages 5–12.