Jpz123, No, they will not be in BC longer because of the holidays. There are extra days built in.
By counting 9 Fridays, PIR will most likely be 12/29/2017 for those who ship on 10/30/2017. It could be 12/22/2017 for some if they are in a Push Division and are placed in one of the last divisions from the week before. It is possible for some who arrive on the same date to have PIR a week apart. Wait on The Form Letter to know the PIR date for sure. Arrival and What Happens at the RTC within Boot Camp Moms (and loved ones) will let you know what will soon be happening and what to expect.
Ten Fridays does happen for some who ship on Wednesday or Thursday in November and December at times, but not for those who ship at the beginning of the week.
Jpz123, the "A" School is across the street. He may be able to go home for part of the holidays since he is having PIR during the holiday stand down at the "A" Schools, but he will have to check in first and find out if he is eligible for Leave. See the info in PIR Day and Liberty during PIR Weekend for more info on that and more.