Japanese phrase
___日に立ち会いをお願いします。 ___ hi ni ta chi a i o o nega i shi ma su
Meaning
Please be present on ___.
When to use it
Requests attendance on a particular day. This formal wording suits scheduled work or events and can suggest that presence is needed as an observer.
Example dialogue
工事日は金曜日です。 kō ji hi wa kin yō hi de su
The construction is scheduled for Friday.
では、工事日に立ち会いをお願いします。 de wa kō ji hi ni ta chi a i o o nega i shi ma su
Then, please be present on the day of the construction.