Step 1: Understand the wording.
The first day of the month is Thursday. The fifth day from the 16th means we move 5 days ahead of the 16th, landing on the 21st.
Step 2: Use the weekly cycle.
Days repeat every 7 days, so dates 1, 8, 15 all share the same weekday.
Step 3: Mark the Thursdays.
The 1st is Thursday, so the 8th is Thursday and the 15th is Thursday too.
Step 4: Step to the 16th.
The day after the 15th is the 16th, which is Friday.
Step 5: Count to the 21st.
From the 16th, count 5 days. The 17th is Saturday, 18th Sunday, 19th Monday, 20th Tuesday, and the 21st is Wednesday.
Step 6: Conclusion.
So the day is Wednesday.
Answer: Wednesday