During a year when Thanksgiving is on Thursday, November 23, on what day of the week does December 23 occur?
Keep up with which days are Thursdays by repeatedly adding 7: November 23, November 30, December 7, December 14, and December 21.  Since December 23 is two days after December 21, it falls on a $\boxed{\text{Saturday}}$.
Saturday
Level 2
Number Theory
Problem: During a year when Thanksgiving is on Thursday, November 23, on what day of the week does December 23 occur?
Solution:<|START_OF_LATENT|><|PRIOR_PREFIX|>Thanksgiving is celebrated on the fourth Thursday of November. In 2023, Thanksgiving falls on November 23. The week starts on Sunday and ends on Saturday. To determine the day of the week for December 23, we first calculate the number of days between November 23 and December 23.

From November 23 to November 30, there are 7 days. From December 1 to December 23, there are 23 days. Therefore, the total number of days from November 23 to December 23 is 7 + 23 = 30 days.

Next, we find the day of the week 30 days after Thursday. The days of the week cycle every 7 days. We calculate the remainder of 30 divided by 7 to determine how many days forward we move in the week. 

30 divided by 7 equals 4 with a remainder of 2. This means we move 2 days forward from Thursday. 

Counting forward: 
- Friday is 1 day after Thursday.
- Saturday is 2 days after Thursday.

Thus, December 23 falls on a Saturday.<|END_OF_LATENT|> The final answer is $Saturday$.