Hugs for you. As Bug and Melissa mentioned, my XH filed for D on VD too. I'm not sure of the significance, because his mom died on VD in 2004 and she hated me and he hated that she hated me, so it might have been his final FU to his mom. Her birthday was on the 15th so...
What really stinks is that he had you served in front of the kids. I think he's a total jerk for doing that to you and them. Mine flat out told me, "I don't want to have you served at work or in front of the girls. So if I give you the petition personally, will you sign and notarize and get it back to me?" Looking back, I appreciated it.
Hang in there. You've got the kids who need you to be strong for them. It's hard, but doable.
Good luck,
Betsey
"There are only 2 ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle."