A calendar is the second map this year hands a child: a month laid out as a grid of weeks, with time running left to right and then dropping a row, like reading. The descriptor asks for two skills — identify the date, and determine the number of days between events — and both live entirely inside that grid. The unit uses one model month throughout, a June of 30 days that starts on a Monday, so every question can be checked against the same picture with a finger.
Reading the grid
A calendar is a map of a month. Every date has a square, every square has a column.
What day of the week is the 12th? Find the square, then read its column.
Find the square, read the column
Reading a calendar is two moves done in order: find the numbered square, then look straight up to the column heading for the day of the week. Children who skip the second move guess; children who do it with a finger never miss. The grid also rewards pattern hunters — all the Mondays stand in one column, the row tells you which week of the month you are in, and a month that starts on a Monday lays its weeks out as neat sevens: 1 to 7, 8 to 14, and so on.
Sleeps until
Children already measure time in sleeps. Each sleep is one jump to the next date.
From the 9th, how many sleeps until the birthday on the 12th?
Sleeps are jumps
Children already own a unit of time: the sleep. How many sleeps until the birthday is a real question in every household, and it carries the unit's central discipline inside it — you count the jumps between dates, never the dates themselves. From the 9th to the 12th is three hops, three nights, three sleeps, even though four numbered squares are involved. Getting that distinction into the hands early is the vaccine against the off-by-one errors that haunt date arithmetic for years.
Between two events
The descriptor in one question: how many days apart? Jumps answer it; squares mislead.
Two events on the calendar. How many days from the first to the second?
Between is counted in jumps
The same discipline scales up to any two events: the number of days between them is the count of jumps from one to the other, which is exactly the subtraction 19 take 12. This is the descriptor's second clause becoming number work, and it is worth saying out loud that the calendar and the subtraction must agree — if hopping gives 7 and the take-away gives 7, both methods are vouching for each other. The week-apart pair is the gem: seven days, and the weekday comes back unchanged.
Built in sevens
Why is the grid seven squares wide? Jump by a week and the grid answers.
The 5th is a Friday. Jump a whole week forward and watch the column.
Built in sevens
Why is every calendar seven squares wide? Because the week repeats, and the grid is drawn so that the repeat falls straight down: add seven days and you land in the same column, on the same weekday, one row lower. Children who jump the 5th to the 12th to the 19th and watch Friday refuse to change have discovered the structure rather than memorised it. That one insight powers the rest of the unit — and quietly seeds the multiplication of sevens waiting a year or two ahead.
Plan the party
Real calendar work: a date some weeks and days away. The grid does the arithmetic.
Whole weeks move straight down the grid; leftover days walk along the row.
Weeks down, days across
Planning forwards or backwards is where the grid pays its way: a date two weeks and three days from now is two hops straight down and three steps along the row, no counting on fingers required. Children should narrate the move — down, down, across, across, across — because the narration is the method. Next door in the strand, time zooms in from days to hours: the clock unit is waiting, and the quarter-hours met in the fractions unit are about to get hands.
Quick self-check
1. In this June, the 12th is a...
2. Today is the 9th. The birthday is the 12th. How many sleeps?
3. From the 12th to the 19th is...
4. The 5th is a Friday. The 12th is...
5. This June starts on a Monday and has 30 days. The 30th is a...