I here from many people looking to start a new workout routine that they would rather wait till the start of the new week then start that day. There is something in their mind that make them feel like the workout will feel more complete if they start at the beginning of the week. Well I let you in on a little secret, your body doesn't care what day of the week you start your routine. It just wants to workout. The results from Monday will be the same if you start on Wednesday or Thursday.
I get it that psychologically it may feel better to start at the beginning of the week, because it's like a fresh start. But understand whenever you do start a new workout routine, that is your fresh start. You just took the first step to changing your life. Monday's weren't designated as the only day you can make a life altering change. Monday also tend to be one of the busiest day's of the week. So stop holding yourself back from getting started today.