It's the roundest today! Add a merry feast to go with it!

Question

What are Marc, Oliver, Olivia, and Noah talking about:

Marc: It's sure round!
Oliver: If it's not round I will eat my shoe!
Olivia: Well, that's one opinion. It's sure gleaming off that nice bright light of hers!
Noah: Like it do we? Well we should go and take a closer look with our glassy friend!
Olivia: It's going to enlarge her a lot, you know.
Marc: Well, I'm freezing. Maybe we should go in and eat our food? Remember, we only eat it once a year!
Oliver: Oh that. I'm sure it's disgusting!
Olivia: Go try it out. It's really yummy with the fills! Add the egg on top, homemade, round, just like it!
Noah: Well, what are we waiting for! Happy ______________

Answer 1

What are they talking about?

The Moon

When does all this take place

During the Mid-Autumn Festival or Moon Festival

that nice bright light of hers

Sunshine reflected off the moon

our glassy friend

A telescope

Maybe we should go in and eat our food? Remember, we only eat it once a year!

Mooncake is traditionally eaten once a year during the Mid-Autumn Festival

Go try it out. Its really yummy with the fills! Add the egg on top, homemade, round, just like it!

It seems that the outer pastry is made using duck egg yolk.

Well, what are we waiting for! Happy ______________

"Mid-Autumn" (or possibly "Moon Day") - the 15th day of the 8th lunar month

Notice the hint

The initials of the speakers spell out MOON