Calendar Problems - Intermediate Level: year codes INTERMEDIATE

Level up your calendar problems skills with this comprehensive review. 20 intermediate-level problems await in Worksheet 14 of 30. Focus area: year codes. Learn calendar arithmetic, date finding, calendar puzzles through systematic practice. Designed for mid-level learners seeking moderate complexity with mixed patterns.

📝 Worksheet 14 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate level

What you'll learn in this worksheet:
Your progress through Calendar Problems
Worksheet 14 of 30 (46% complete)

Question 1

How many days are there from the beginning of August to the end of December in 2018?
From August to December in 2018: 153 days total.

Question 2

What is the fiscal year for the date 09-08-2027 (assuming April-March fiscal year)?
Fiscal year starts in April. Since month is 8 (August), it belongs to FY2027-2028.

Question 3

What is the date of the 1st Tuesday in December 2029?
The Tuesdays in December 2029 fall on: 4, 11, 18, 25. The 1st one is 4.

Question 4

How many odd days are there from 01-01-1998 to 05-09-2000 (inclusive)? (Note: Odd days = remainder when total days are divided by 7)
Total days = 979. Odd days = 979 mod 7 = 6.

Question 5

If the days of the week are coded as {'Monday': 'Zeta', 'Tuesday': 'Alpha', 'Wednesday': 'Gamma', 'Thursday': 'Delta', 'Friday': 'Theta', 'Saturday': 'Epsilon', 'Sunday': 'Omega'}, what is the code for Saturday?
Saturday is coded as Epsilon.

Question 6

If 14 March 2012 was a Wednesday, what day will 14 April 2012 be?
The gap is 31 days. 31 mod 7 = 3 days shift. Wednesday + 3 days = Saturday

Question 7

If today is Tuesday, what day was it 8 days ago?
Starting from Tuesday (1), before 8 days: (1 - 8) mod 7 = 0 = Monday

Question 8

How many days are there from the beginning of April to the end of October in 2027?
From April to October in 2027: 214 days total.

Question 9

How many days are there from the beginning of March to the end of May in 2012?
From March to May in 2012: 92 days total.

Question 10

On which date does Christmas fall in 2028?
Christmas falls on 25 December 2028.

Question 11

In which ISO week does 19 November 2020 fall? (Note: ISO week definition - Monday start, week 1 contains first Thursday)
ISO week number is calculated with Monday as the first day of week, and week 1 is the week containing the first Thursday. 19-11-2020 is in week 47.

Question 12

What is the date of the 3rd Tuesday in April 2023?
The Tuesdays in April 2023 fall on: 4, 11, 18, 25. The 3rd one is 18.

Question 13

How many Thursdays are there in June 2026?
June 2026 has 4 Thursdays

Question 14

What day of the week was 31 August 1988?
Using Zeller's congruence: 31/8/1988 = Wednesday

Question 15

What day of the week was 31 December 2200 (the last day of the 22nd century)?
31 December 2200 was a Wednesday. Note: Century years divisible by 400 are leap years, others are not.

Question 16

How many days are there from the beginning of May to the end of November in 2010?
From May to November in 2010: 214 days total.

Question 17

If 24 May 2010 was a Monday, what day will 24 May 2020 be?
24 May 2020 will be a Sunday

Question 18

If someone was born on 9 January 1992 (a Thursday), what day of the week will their birthday be in 2020?
The birthday 9 January 2020 falls on a Thursday.

Question 19

How many Fridays are there in June 2024?
June 2024 has 4 Fridays

Question 20

What is the date of the 5th Wednesday in July 2025?
The Wednesdays in July 2025 fall on: 2, 9, 16, 23, 30. The 5th one is 30.
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