The pit of $month and $dayofmonth in MongoDB

Recently used to $month and $dayofmonth These two commands, found a bit of a pit. The total feeling of the data and I look at the data from the database is not the same ...

I found out the information on the Internet.

The function $dayOfMonth is processed based on the 0 time zone, and the data in the 0:00-8:00 time is calculated the day before. Therefore, in the statistical query, the conditions and functions of the time zone to be consistent.

Reference: http://blog.csdn.net/miyatang/article/details/50854571

The pit of $month and $dayofmonth in MongoDB