This code system http://hl7.org/fhir/days-of-week defines the following codes:
| Code | Display | Definition |
| mon | Monday | Monday |
| tue | Tuesday | Tuesday |
| wed | Wednesday | Wednesday |
| thu | Thursday | Thursday |
| fri | Friday | Friday |
| sat | Saturday | Saturday |
| sun | Sunday | Sunday |
Additional Language Displays
| Code | Dansk (Danish, da) |
| mon | Mandag |
| tue | Tirsdag |
| wed | Onsdag |
| thu | Torsdag |
| fri | Fredag |
| sat | Lørdag |
| sun | Søndag |