[make] up for lost time

to enjoy an experience as much as one can, due to the lack of previous opportunity

After being away for months, he planned a special weekend getaway to make up for lost time with his family.
She worked extra hours to make up for lost time caused by the unexpected delays.
Despite their busy schedules, they managed to reconnect and make up for lost time over a long dinner.
The couple traveled extensively after retirement, determined to make up for lost time and see the world.
He enrolled in an intensive course to make up for lost time and catch up on his studies.