when you're concentrated on doing something and forget about time
to lose track of time
Used to describe a situation when it's too late to change it
The ship has sailed
to keep with all the latest trends and new things
to move with the times
used to describe something you do very rarely
once in a blue moon
when you finish something on time
to beat the clock
when you think about long term perspectives
In the long run
when you don't have a lot of time left
run out of time
something that is old-fashioned, not trendy
behind the times
Famous proverb connected with the God
Third time is a charm.