Indicates the day of week within the periodic time range.
The values are as follows:
Sunday: 0x01
Monday: 0x02
Tuesday: 0x04
Wednesday: 0x08
Thursday: 0x10
Friday: 0x20
Saturday: 0x40
If the value is set to Sunday and Monday,
perform the | operation to the values of Sunday and Monday,
and the value is 0x03, and so on.