DATE function in Google Sheets - Practice Problems & Coding Challenges

Challenge - 5 Problems

📊 Formula Result

intermediate

What date does this formula produce?

Given the formula =DATE(2024, 2, 29) in a cell, what is the displayed date?

Google Sheets

=DATE(2024, 2, 29)

A February 29, 2024

B March 1, 2024

C Error: Invalid date

D February 28, 2024

💡 Hint

Remember 2024 is a leap year.

The DATE function creates a date from year, month, and day. 2024 is a leap year, so February 29 is valid.

📊 Formula Result

intermediate

What date is shown by this formula?

What date does =DATE(2023, 13, 1) produce in Google Sheets?

Google Sheets

=DATE(2023, 13, 1)

A January 13, 2023

B December 1, 2023

C Error: Invalid month

D January 1, 2024

💡 Hint

Months over 12 roll over to next year.

Month 13 means 1 month after December 2023, so January 1, 2024.

❓ Function Choice

advanced

Which formula correctly creates March 15, 2025?

Choose the formula that produces the date March 15, 2025 in Google Sheets.

A =DATE(2025, 3, 32)

B =DATE(2025, 15, 3)

C =DATE(2025, 3, 15)

D =DATE(2025, 2, 45)

💡 Hint

Check month and day values carefully.

Only option C uses valid month and day values for March 15, 2025.

🎯 Scenario

advanced

Calculate the date 45 days after January 10, 2024

You want to find the date 45 days after January 10, 2024. Which formula using DATE and arithmetic gives the correct date?

A =DATE(2024, 1, 10 + 45)

B =DATE(2024, 1, 10) + 45

C =DATE(2024, 1, 55)

D =DATE(2024, 2, 24)

💡 Hint

Adding days to a date works by adding numbers to the date value.

Adding 45 to the date value of January 10, 2024, correctly calculates the date 45 days later.

❓ data_analysis

expert

How many valid dates are created by these formulas?

Given these formulas in cells:

=DATE(2024, 2, 29)
=DATE(2023, 2, 29)
=DATE(2024, 13, 1)
=DATE(2024, 0, 15)

How many of these produce valid dates without error?

A 3

B 2

C 4

D 1

💡 Hint

Check leap year and month overflow rules carefully.

DATE(2024,2,29) is valid (leap year). DATE(2023,2,29) is invalid (no Feb 29 in 2023). DATE(2024,13,1) is valid (month 13 = Jan next year). DATE(2024,0,15) is valid (month 0 = Dec previous year). So 3 valid dates.

Practice

1. What does the DATE function do in Google Sheets?

easy

A. It creates a date from year, month, and day numbers.

B. It calculates the difference between two dates.

C. It converts text to uppercase.

D. It adds numbers together.

Solution

1. Step 1: Understand the purpose of DATE

   The DATE function takes three numbers: year, month, and day, and combines them into a valid date.

2. Step 2: Compare with other options

   Other options describe different functions like date difference or text conversion, which are not what DATE does.

3. Final Answer:

   It creates a date from year, month, and day numbers. -> Option A

4. Quick Check:

   DATE function = create date [OK]

Hint: DATE joins year, month, day into one date [OK]

Common Mistakes:

• Confusing DATE with functions like TODAY or NOW
• Thinking DATE calculates differences
• Assuming DATE formats text

2. Which of these is the correct syntax for the DATE function in Google Sheets?

easy

A. DATE(month, day, year)

B. DATE(day, month, year)

C. DATE(year, month, day)

D. DATE(year-day-month)

Solution

1. Step 1: Recall DATE function syntax

   The correct order is year first, then month, then day: DATE(year, month, day).

2. Step 2: Check other options

   Options B and C have wrong order; D uses invalid syntax with dashes and no commas.

3. Final Answer:

   DATE(year, month, day) -> Option C

4. Quick Check:

   Correct syntax = DATE(year, month, day) [OK]

Hint: Remember: year, month, day order in DATE [OK]

Common Mistakes:

• Swapping day and month positions
• Using dashes instead of commas
• Putting month first

3. What is the result of =DATE(2024, 13, 1) in Google Sheets?

medium

A. December 1, 2024

B. January 1, 2025

C. January 1, 2024

D. Error

Solution

1. Step 1: Understand month overflow in DATE

   The month value 13 means 1 month after December, so it moves to January of next year.

2. Step 2: Calculate the adjusted date

   So DATE(2024, 13, 1) becomes January 1, 2025.

3. Final Answer:

   January 1, 2025 -> Option B

4. Quick Check:

   Month 13 = January next year [OK]

Hint: Months >12 roll over to next year automatically [OK]

Common Mistakes:

• Expecting error for month 13
• Thinking month 13 means December
• Ignoring automatic date adjustment

4. You entered =DATE(2023, 2, 30) but it shows March 2, 2023. Why?

medium

A. February has only 28 or 29 days, so day 30 rolls into March.

B. DATE function has a bug showing wrong dates.

C. You must enter day before month in DATE.

D. Google Sheets does not support dates in February.

Solution

1. Step 1: Check day overflow behavior

   February usually has 28 or 29 days, so day 30 is invalid and rolls over to March 2.

2. Step 2: Understand DATE auto-adjustment

   DATE automatically adjusts invalid days by adding extra days to next month.

3. Final Answer:

   February has only 28 or 29 days, so day 30 rolls into March. -> Option A

4. Quick Check:

   Invalid day rolls over to next month [OK]

Hint: Invalid days push date into next month automatically [OK]

Common Mistakes:

• Thinking DATE has bugs
• Swapping day and month order
• Believing February dates are unsupported

5. You have year in A1=2023, month in B1=11, and day in C1=35. Which formula correctly gives the valid date?

hard

A. =DATE(A1, B1+1, C1-31)

B. =DATE(A1, B1, 30)

C. =DATE(A1, 12, C1)

D. =DATE(A1, B1, C1)

Solution

1. Step 1: Understand how DATE handles overflow

   DATE automatically adjusts day 35 in November to December 5 (35 - 30 = 5 days into next month).

2. Step 2: Check each option

   =DATE(A1, B1, C1) uses original values and lets DATE fix the date correctly. Others manually change month or day, which is unnecessary or incorrect.

3. Final Answer:

   =DATE(A1, B1, C1) -> Option D

4. Quick Check:

   DATE auto-fixes overflow days [OK]

Hint: Use DATE with raw values; it fixes overflow automatically [OK]

Common Mistakes:

• Manually adjusting month or day before DATE
• Assuming DATE errors on large day numbers
• Changing month without reason