The Barddas of Iolo Morganwg, Vol. I., ed. by J. Williams Ab Ithel, [1862], at sacred-texts.com
There are eight parts of the day: 1. morning; 2. dawn; 3. vapourlessness; 4. noon; 5. evening; 6. twilight, &c.
Or thus:--
1. Dawn; 2. morning; 3. vapourlessness; 4. noon; 5. rest; 6. twilight; 7. disappearance; 8. midnight 1.