That all depends on the year. In the year the question is being answered, 2013, it starts on a Sunday. The answer to the question will change each year. Looking at the coming years:
In 2014 it starts on a Monday.
In 2015 it starts on a Tuesday.
In 2016 it starts on a Thursday.
In 2017 it starts on a Friday.
In 2018 it starts on a Saturday.
In 2019 it starts on a Sunday.
In 2020 it starts on a Tuesday.
In 2021 it starts on a Wednesday.
In 2022 it starts on a Thursday.
In 2023 it starts on a Friday.
In 2024 it starts on a Sunday.
In 2025 it starts on a Monday.
December 1st starts on Wendsday.
Wednesday the 1st of December 2010.
saturday
December 1, 2010 was on Wednesday.
December 1st!
Wednesday
December 2010
It starts on December 14th and the twelfth day is December 25th.
Midnight on the 31st December
It started on the evening of December 20th.
Sunday, December 22, 2008
Janurary the 1st of course start of a new year!!