Okay, so I have a few questions about the Angelus that I will try to squeeze into one thread.
- Must the Angelus be recited at 6 AM, 12 noon, and 6 PM, and kneeling?
My experience has been that someone discussing the timing of the Angelus will usually mention those specific times, but I agree with the others who’ve posted so far: these times and a default posture of kneeling are not exact requirements.
The most recent Enchiridion of Indulgences (1999),
available in Latin at the Vatican website, uses the phrasing “primo diluculo, vel meridiano tempore, vel sub vesperam,” which is more general language than “at six in the morning…” Correct me if I’ve overlooked it, but I also don’t see a prescribed posture.
If these conditions are good enough to obtain the indulgence, they should be good enough even if you somehow don’t intend to obtain one.
The old Catholic Encyclopedia (1908)
article on the Diario Romano, an annual booklet published “with papal authorization” that gave times for ecclesiastical events in Rome, also mentions a practice that is not an unchanging time of day throughout the year:
A table is then given for the ringing of the bell for evening Angelus, which varies with the time of sunset, and ranges from 5.15 p.m. to 8.15 p.m.
Although this practice appeared over a hundred years ago in Rome (which is not necessarily where you, the reader, are), it’s not forbidden in our day, and you (the reader) can do something similar with the time of sunset–and sunrise and maybe even solar noon?

–in your own location.
I can see advantages for a few different ways of timing the Angelus (the usual fixed times, your own equivalent fixed times, changing seasonal times…), depending on a number of possible factors.
2)The Angelus is recited standing on Saturday night, Sunday morning, Sunday noon, and Sunday night?
I’ve heard of this practice, though I don’t know where, and I typically follow it.
This is probably not where I heard of it, but the same Catholic Encyclopedia mentions the practice in
its article on the Angelus:
Originally it was necessary that the Angelus should be said kneeling (except on Sundays and on Saturday evenings, when the rubrics prescribe a standing posture), and also that it should be said at the sound of the bell; but more recent legislation allows these conditions to be dispensed with for any sufficient reason, provided the prayer be said approximately at the proper hours, i.e. in the early morning, or about the hour of noon, or towards evening.
And this phrasing sounds like what we see today.