Ok this is my workout i put together, is it good?

Day 1 – Chest/Calves
Flat bench 5x5
incline dumbell press 2x8-10
Decline dumbell fly 2x8-10
standing calve raises 5x15

Day 2 – Shoulders/Back
military press 5x5
deadlift 5x5
Barbell upright row 2x8-10
Shoulder forward things 2x8-10
shoulder side things 2x8-10

Day 3&4 – Rest

Day 5 Biceps/Triceps
close grip bench 5x5
standing barbell curls 5x5
incline dumbell curls 2x8-10
skull crushers 2x8-10
preacher curls 2x8-10
tricep pressdown 2x8-10

Day 6 – Legs/Abs
Squat 5x5
leg press 2x8-10
Crunches 2x20
Lying Leg Curl 2x8-10

Day 7- Rest

Rinse and Repeat

I was planning on starting it tomorrow, but i would only be on it for about 3 weeks and then i go on vacation for 2 weeks where i cannot workout. So is it worth it to start it, then take a break for vacation and then start up again or will i lose what i had before vacation? Thank you all for the help.