How Long/Short to Delay Updates?

This is what makes Manjaro amazing.
As I understand, no updates are just pushed out in stable branch before being tested first.

I remember this was the main Grub issue. This is really smart.

In my first thread (sort of, was when I installed), KDE, Stability of Manjaro I have seen many users reporting they have been using the same install for very long time.

Well, I just checked the announcements and found an update and found like 83% of 160 users reporting no issues. So, I considered this safe enough and just ran my script.

One question I have here:
I assume my script checks the time stamp of the update in the repos to decide if 3 days have passed or not to install or not.
This update was just yesterday (first of the month), but when I ran the script, I saw it updating.
Are the updates saved with that date (first of the month, the date the update comes out) or an earlier date when it was moved to stable branch?
Same question another way, I assume for example FireFox was moved to Stable repos mid September, and Libreoffice on the 20th, and the update was “published” or released 1st of October, do they keep those dates or they are all dated 1st of October?