I find creating a communal Master Calendar QVD covering more dates than I will ever require very useful on many occasions.
I can load it at the start of the load script with a Where condition to only load the required date range. The load probably won't be optimised, but it is only a small QVD and will be a sub 1 second load.
Then when I am later loading large transactional QVD's I can do an optimised Where Exists against the Calendar Dates loaded.
Hence I can automate things to only load the transactional data needed for my required dates, often this year and the last N years, maybe the last 24 months.