Lesson 3.1 · Year, month and day (1)
Hua's Classroom for Shanghai Maths — One Lesson One Exercise (English edition, pages 42–44).
Lesson Alignment
How this Shanghai Maths lesson connects to learning goals, Common Core, and Eureka Math.
Learning Objectives
Students will be able to:
- 01State today’s date including weekday. (Question 1)
- 02Record the number of days in each month. (Question 2)
- 03Connect holidays to month, date, and weekday.
- 04Count days / Wednesdays across a date range. (Enhancement)
Common Core Standards
| Code | Standard (focus for this lesson) |
|---|---|
| 3.MD.A.1 | Tell and write time; solve problems involving time intervals. |
| 2.MD.C.7 | *(revision)* Tell time; write times. |
| 3.OA.D.8 | *(related)* Multi-step counting problems. |
Eureka Math Correspondence
| Shanghai Maths | Focus | Eureka Math |
|---|---|---|
| Calendar language | Year / month / day / week | G3 M2 time; calendar sense |
| Counting days | Intervals on calendar | Problem solving |
Core Concepts
Read and record dates: year, month, day, and day of the week.
Year, Month, Day
- A year has 12 months.
- Write today’s date: day of the month, month name, year, and weekday.
Days in Each Month
Students record days for each month this year (table: Jan–Dec).
| Type | Days | Months (typical) |
|---|---|---|
| 31-day months | $31$ | Jan, Mar, May, Jul, Aug, Oct, Dec |
| 30-day months | $30$ | Apr, Jun, Sep, Nov |
| February | $28$ or $29$ | Common year / leap year |
Days of the Week
There are 7 days in a week. Connect holidays to weekday (e.g. Halloween 31 October).
Applications
- When does the second Sunday in May fall? (Mother’s Day style questions)
- Length of summer holidays / school term in days; how many Wednesdays?
Key Terms & Definitions (Reference)
Quick glossary for this lesson.
| Term | Definition |
|---|---|
| Year / month / day | Units for naming a date. |
| Weekday | Day of the week (Monday–Sunday). |
| Calendar | Table of days in months and weeks. |
Key Answers
Quick reference for this lesson’s exercise answers.
1. Sample: 20th · October · 2025 · Monday; 12 months; 31 days this month.
2. Jan 31, Feb 28/29, Mar 31, Apr 30, May 31, Jun 30, Jul 31, Aug 31, Sep 30, Oct 31, Nov 30, Dec 31.
3. Jul & Aug · 31 · big months Jan/Mar/May/Oct/Dec; Children’s Day 1 Jun · 30 · small Apr/Sep/Nov; fewest Feb 28–29; year 365 days.
4–5. 7 days/week; holidays & birthdays student-specific (sample: Halloween 31 Oct; Thanksgiving 27 Nov; Christmas 25 Dec; birthday 5 Mar).
6. 2025–2034 Feb: 28×3, 29 (2028), 28×3, 29 (2032), 28×2. Feb usually 28, else 29; if 28 → 365 = 52 weeks + 1 day. Birthday-on-leap: 29 Feb (e.g. 2016).
7. 1 May 2020 Friday → second Sunday 10 May.
8. Summer holidays — student-specific.
9. Sample: 1 Aug → 9 Jan = 162 days; ≥23 Wednesdays.
10. June with 4 Wed & 5 Tue → 1 June Monday.