Important. The first "week" is not a 7-day-long week and ends Thursday, January 19, 2017 11:59 PM ET. (Rule 5 chart). You'll need to decide whether to enter weekly on a Fri-Thurs basis or just once for that time period.
The remaining weeks are regular Friday-Thursday weeks, except for the final week which is short.
Posted by: 123ABC on January 7, 2017