const time.stdDay

4 uses

	time (current package)
		format.go#L132: 	stdDay                                         // "2"
		format.go#L230: 			return layout[0:i], stdDay, layout[i+1:]
		format.go#L706: 		case stdDay:
		format.go#L1110: 		case stdDay, stdUnderDay, stdZeroDay: