const time.stdPM

4 uses

	time (current package)
		format.go#L146: 	stdPM                    = iota + stdNeedClock // "PM"
		format.go#L255: 				return layout[0:i], stdPM, layout[i+2:]
		format.go#L749: 		case stdPM:
		format.go#L1166: 		case stdPM: