grihapravesam can be done in kartigai masam. take a muhurtham (auspicious date and time ) from Vadhyar.hope on grihapravesam day, you will have ganapathy homam morning, bhagavathy seva evening etc. I am from Kerala. Grihapravesam night we stay in the house, with available convenience. owner of house, his wife , etc.
then no problem to fully shift any time. margazhi month no problem. actually time for only griha pravesam to be seen