There are two ways of counting in Welsh. The newer system is based on ten and an older system that is based on twenty. You know, when you are singing an English translation of a Catalan Christmas Carol and you sing, "On December five and twenty" Or you're doing a bit of research on American history and read, "It was four score and seven years ago." Its that sort of thing. And, while the older system is on its way out in most daily actitivies, such as counting above twenty-nine, it is still very much entrenched in something all of us do at least once a day: tell the time.
So, to begin with, one needs to be able to count to twelve, which is simple enough: un (een), dau (dai), tri (tree), pedwar (pedwahr), pump (pimp), chewch (ch*ech), saith, wyth (oith), naw (now), deg (deig), un ar ddeg (een ahr dd**eig), deuddeg (deiddeg).
How cool is that, being able to count to twelve in Welsh?
Continuing on, for "after" or "past" you say "wedi" (wehdee). To say "to", you say "i" (ee).
"chawrter" (chahrter) means "quarter" and "hanner" (hahner) means half. So, to say quarter past 2 you say, "chawrter wedi dau". If you want to say half past eleven, you say, "hanner wedi un ar ddeg." (or, "hanner awr wedi un ar ddeg." in which "awr" which sounds like "hour" means, surprisingly "hour."). All of this is the cake walk. Its when you want to say twenty after, or twenty-five to, or what have you that things get hairy.
You see, in the ten system, you'd just say dau ddeg for twenty. Simple, two tens. In the old system, you say, ugain (eegain). Got it? un ar hugain, dau ar hugain, tri ar hugain...and up and onwards. Except when you are telling time. Then, before you said, "ar" (I know, your inner pirate is dying to tell time now) you say, "munud" (minid).
So, if someone asks you, "Faint o'r gloch ydy hi? (vaint or gloch yhdee hee?) And your watch is telling you 2:40, you would answer, "Mae hi'n hugain munud i tri" (my heen heegain minid ee tree). Its twenty minutes to three. Or, if it was 4:21 you would say, "Mae hi'n un munud ar hugain wedi bedwar."
Okay, so maybe time isn't all that bad.
Oh, one more thing, in the older system, everything up to 15 follows the pattern of "un ar ddeg" (except deuddeg). After fifteen, pymtheg, you add pymtheg instead of deg, so seventeen is "dau ar pymtheg". Think of it as roman numerals.
Well, then. You're set and ready to go with time.