1	Morning		MORN	Event occurs during the morning. The exact time is unspecified and established by institution convention or patient interpretation.
2	Early Morning		MORN.early	Event occurs during the early morning. The exact time is unspecified and established by institution convention or patient interpretation.
3	Late Morning		MORN.late	Event occurs during the late morning. The exact time is unspecified and established by institution convention or patient interpretation.
4	Noon		NOON	Event occurs around 12:00pm. The exact time is unspecified and established by institution convention or patient interpretation.
5	Afternoon		AFT	Event occurs during the afternoon. The exact time is unspecified and established by institution convention or patient interpretation.
6	Early Afternoon		AFT.early	Event occurs during the early afternoon. The exact time is unspecified and established by institution convention or patient interpretation.
7	Late Afternoon		AFT.late	Event occurs during the late afternoon. The exact time is unspecified and established by institution convention or patient interpretation.
8	Evening		EVE	Event occurs during the evening. The exact time is unspecified and established by institution convention or patient interpretation.
9	Early Evening		EVE.early	Event occurs during the early evening. The exact time is unspecified and established by institution convention or patient interpretation.
10	Late Evening		EVE.late	Event occurs during the late evening. The exact time is unspecified and established by institution convention or patient interpretation.
11	Night		NIGHT	Event occurs during the night. The exact time is unspecified and established by institution convention or patient interpretation.
12	After Sleep		PHS	Event occurs [offset] after subject goes to sleep. The exact time is unspecified and established by institution convention or patient interpretation.
13	Before Sleep		HS	Description: Prior to beginning a regular period of extended sleep (this would exclude naps). Note that this might occur at different times of day depending on a person's regular sleep schedule.
14	Upon Waking		WAKE	Description: Upon waking up from a regular period of sleep, in order to start regular activities (this would exclude waking up from a nap or temporarily waking up during a period of sleep) Usage Notes: e.g. Take pulse rate on waking in management of thyrotoxicosis. Take BP on waking in management of hypertension Take basal body temperature on waking in establishing date of ovulation
15	With Meal		C	Description: meal (from lat. ante cibus)
16	With Breakfast		CM	Description: breakfast (from lat. cibus matutinus)
17	With Lunch		CD	Description: lunch (from lat. cibus diurnus)
18	With Dinner		CV	Description: dinner (from lat. cibus vespertinus)
19	Before Meal		AC	before meal (from lat. ante cibus)
20	Before Breakfast		ACM	before breakfast (from lat. ante cibus matutinus)
21	Before Lunch		ACD	before lunch (from lat. ante cibus diurnus)
22	Before Dinner		ACV	before dinner (from lat. ante cibus vespertinus)
23	After Meal		PC	after meal (from lat. post cibus)
24	After Breakfast		PCM	after breakfast (from lat. post cibus matutinus)
25	After Lunch		PCD	after lunch (from lat. post cibus diurnus)
26	After Dinner		PCV	after dinner (from lat. post cibus vespertinus)