Can I only take one rest day for the 30 day Blend?

I'm doing the 30 day Blender program and I'm a little behind. I am doing each day, but the calendar isn't caught up. I can catch up to the dates if I only take one rest day and skip the optional rest/work out day. Is that too much? Is it designed for 2 days of rest? I just like to follow each work out and not skip any (besides the optional work out day) and get my check marks all filled in. Thanks for any advice- I don't want to hurt myself by not taking 2 full rest days if I'm supposed to.