Thank you @LipChean_Soh for the Reply, See below business requirement.
I have created supplier bid module, which will be used by various suppliers. This bid process will happen only for 2 months in a year and I have take back of daily modification by individual suppliers during this 2 months time. If i give full year range it is increasing module size with various other dimensions in it. That is why i am just looking for 3 months time range so that i can save the memory.
I understand, but unfortunately we can't define a Time Range than's shorter than a year.
I'm not keen to suggest using a Fake Day list without knowing more about the business requirement, i.e. formulas, mockups, problems faced, etc. You should close this topic, and create a different topic if you need some suggestions from the forum.
But you should know that while a Fake Day list can help save workspace, some of the most powerful Time related functions in Anaplan are not applicable.