How far in advance do you have to make reservations?

You can usually get same day reservations if you're a little flexible on time. Otherwise a couple days is sufficient.

Typically the same day will work, but I would do so much further in advance on a holiday like Mother’s Day.

Use opentable, and you should typically be fine a day or so in advance.

Day in advance should be good, or use thr open table app

If I have a specific night and time, I like to make reservations about a week in advance

Same day Wil be fine, usually.