The readings follow the regular jukugo rules (on'yomi reading) but take note that 日 is read as じつ, the alternate on'yomi reading. You've been seeing this reading a lot lately, so hopefully you know it by now and it's easy!
Those were launched on the same day.
The bands I like have concerts in different music clubs on the same day and I'm really not sure which one I should go to.
On the same day of my father’s death, Apollo 11 succeeded in landing on the moon’s surface.