Time Expressions (に)
The particle に (ni) is used with time expressions to indicate the time when an action occurs.
Examples
毎日学校に行きます。
I go to school every day.
午後3時に会います。
I will meet at 3 PM.
日曜日に友達と遊びます。
I will play with my friends on Sunday.
Quick check
午後3時___会います。