にあたって
(Niatatte)
on the occasion of / at the time of (formal).
Connection rules
- +V plain non-past + にあたって / にあたり; noun + にあたって / にあたり.
- +Formal / ceremonial register — typical of speeches and formal announcements.
- +Marks significant occasions, not routine ones.
Examples
1.
新年にあたって、ご挨拶申し上げます。

Shinnen niatatte, go aisatsu moushiage masu.
On the occasion of the new year, I offer my greetings.
「on the occasion of / at the time of (formal)」
2.
出発にあたり、準備を整えた。

Shuppatsu niatari, junbi o totonoe ta.
In preparation for departure, I made ready.
「on the occasion of / at the time of (formal)」
Practice
On the occasion of the opening of the new store, I would like to say a few words.
新店舗の___、一言ご挨拶申し上げます。
Romaji also accepted