Careful with this one!
yn Hydref / ym mis Hydref = in October
yn yr hydref = in the autumn/fall
You should. :-) or a start a blog-like new discussion, perhaps. Sarah-Cheung is right,. I also seem to learn something new and interesting from your every comment.
That's right. I see Welsh is not an easy thing to handle. :D
P.S. Every time I read your comment I learn something new! I thought "croeso" was only used to welcome someone; now I see it also works as "you're welcome"! XD
So essentially, it is the presence or absence of 'yr' that distinguishes the two? The presence of 'the' must mean that '(the) autumn' is being meant?
The "mis" is key here. Saying Mis Hydref would usually mean October, unless you were being oddly poetic.
Unless I'm completely wrong, of course.
Yes, absolutely, if 'mis' is present then it is clear. However, the first example 'yn Hydref' suggests it can be omitted. In that case it would seem that the inclusion of 'yr' is the important thing. :-)