ring in

US /rɪŋ ɪn/
UK /rɪŋ ɪn/
"ring in" picture
1.

to call a place by telephone

:
Please ring in your order by noon.
I need to ring in to the office to check my messages.
2.

to mark the beginning of something, especially a new period of time, with a celebration or special event

:
We always ring in the New Year with fireworks.
The town decided to ring in the new century with a grand festival.