A.m.

Greenfield … Monday thru Friday, 9 to 12 a.m.

One of the most common night shifts is the 12 a.m.-to-8 a.m. shift.

We never say 12 a.m. or 12 p.m. It's either 12 midnight or 12 noon, respectively.

The 12-hour clock uses A.M. for the morning hours of midnight (12:00 A.M.) to almost noon (11:59 A.M.) and the P.M. designation for the hours from noon (12:00 P.M.) to almost midnight (11:59 PM).

The 12-hour clock, which is used in the U.S., Canada, and a few other countries, divides time into two cycles: a.m. (ante meridiem, Latin for before midday) from midnight, 12 a.m., to 11:59 a.m.; and p.m. (post meridiem, Latin for after midday) from noon, 12 p.m., to 11:59 p.m.

The following daylight peaks are identified around lunchtime, from 12 am to 1 pm, while for weekend days, the curve show several daylight peaks from 7 am to late lunchtime, around 1 pm.

Some AI startups are taking the workplace back to the dark ages, adopting the Chinese “9-9-6 work schedule” in which employees toil from 9:00 a.m. to 9:00 p.m. six days a week from Monday to Saturday.