If September 10, 2003 is Wednesday, what day is September 10, 2004?

If September 10, 2003 is Wednesday, what day is September 10, 2004?

There are 30-10 = 20 days from September 10 to September 30 in 2003, 31 days in October and December, and 30 days in November, so there are 20 + 31 × 2 + 30 = 112 (days). 2004 is a leap year, 31 days in January, March, may, July, and August, 30 days in February, 29 days in April, 30 days in June, and 10 days in September

This year's December 1st is Wednesday. Next year's December 1st is what day?

December 1, 2010 is Wednesday and December 1, 2011 is Thursday

What day is December 31, 2010 and March 15, 2011?
What day is December 31, 2010 and March 15, 2011

January 31 days, February 28 days, March 15 days
31+28+15=74
74 / 7 = 10 + 4,
March 15, 2011 is 74 days away from December 31, 2010, which is 10 weeks and 4 days
The fourth day after Friday is Tuesday
The answer is Tuesday

What day is December 31, 2011

It's Saturday