11. In a certain year, the month of August has 5 Mondays and 4 Tuesdays, then the 8th of August in that year is a

Keep the original text's line breaks and format, output the translation result directly.
【Analysis】First, analyze the 5 Mondays and 4 Tuesdays in August, which indicates that the last day of the month is Monday, August 31. We can solve this by enumeration.
【Solution】Solution: According to the problem:
5 Mondays and 4 Tuesdays in August indicate that the last day of the month is Monday, August 31.
August 8 is $31-8=23$ days before the end of the month, which is 23 days before Monday (three weeks and 2 days).
Therefore, August 8 is a Saturday.
The answer is: Saturday