にあたって

at the time of
に当たって
at the time of

* * *

-にあたって, -にあたり

as…; as of…; on….

●年頭にあたり at the start of the year; now (that) a new year is starting

・入社するにあたっての抱負 the aspirations that accompany entry to a company.

●立候補にあたりまして, 一言ご挨拶を申しあげます. I would like to say a few words (on 《米》 running [《英》 standing]) as a [your] candidate.