According to a post on the official forums by DevonCarver the Friday reset time will be moved 2 hours earlier to make it earlier for European players who have reset in the middle of the night.
Starting this Friday 4/ 19 the new reset time will be 6pm est/ 3pm pst which is definitely going to be an issue for a lot of family members.
Below is the lnik to the official post.
https://forum-en.guildwars2.com/forum/pvp/wuvwuv/Changing-WvW-Match-Reset-Times