But we don't have a 'Year 0', it goes 1BCE to 1 CE.
Lunations are only ~29.5 days long, between specific moon phases. They still count one year as 12 lunations, ~354 days. Right now is Rajab on the Islamic Calendar, but that's still the month, not the moon. According to the Farmers Almanac, January is the Wolf Moon, taking from both Native American and European Colonial traditions.
Yes, there are multiple counts. Rajab is the 7th month of the Islamic (Hijri) Calendar, AH 1447, while Tevet is the 4th month of the Hebrew Calendar, AM 5786.
Hopefully this helps, and I understood you correctly. If not, Wikipedia has charts of the current date according to multiple calendars when looking at specific calendars, like the Islamic Calendar, or you can look more at Lunar Calendars, and the differences between Solar, Lunisolar, and Lunar Calendars.
He probably sketches a line to follow that he can see through the bottom of the router. It's probably around 3/4 inch bit, it just needs to be wide enough for the LED rope, so maybe 1 inch. It would take a couple passes to get that depth, but the first would be the hardest.