enter into the spirit (of something)
To show one's interest in enjoying a social event by actively participating in its activities, dressing appropriately, etc. I specifically wore red and green to enter into the spirt of Christmas. Come on, dance with us! Enter into the spirit!
get into the spirit (of something)
To show one's interest in enjoying a social event by dressing appropriately or participating in related activities. I specifically wore red and green to get into the spirt of Christmas. Come on, dance with us! Get into the spirit!