calendar based sleep mode

Hi, i typically do not like to use any sleep mode on regular days, since it often misses data from beginning of the drives, but there are some situations, where i would like to have it. When i place my car ina parking garage at the airport, i do know how many days it can fall asleep without any data loss, so it would be extremly helpful, if you can define a timeframe "from date till date" where a full sleep mode is enabled and automatically disabled at the end. 

btw: thanks for your great software