I'm looking for arguments for when to say "during the day of..." instead of "on the day of...".
When and why would I use the former?
Consider the first three examples on this page of googles:
1. During the Day of Silence in 2007, MassResistance helped organize a counter-event
2. During the day of 31st October - 53 patrols involving 145 sorties
3. Where are the Redeemed During the Day of the Lord?
Each usage is different.
What do they suggest to you?
All the best,
Not a professional ESL teacher.