This value set has an inline code system http://hl7.org/fhir/v3/GTSAbbreviation, which defines the following codes:
| Lvl | Code | Display | Definition |
| 1 | AM | AM | Every morning at institution specified times. |
| 1 | BID | BID | Two times a day at institution specified time |
| 1 | JB | JB | Regular business days (Monday to Friday excluding holidays) |
| 1 | JE | JE | Regular weekends (Saturday and Sunday excluding holidays) |
| 1 | JH | GTSAbbreviationHolidays | Holidays |
| 2 | _GTSAbbreviationHolidaysChristianRoman | GTSAbbreviationHolidaysChristianRoman | Christian Holidays (Roman/Gregorian [Western] Tradition.) |
| 3 | JHCHREAS | JHCHREAS | Easter Sunday. The Easter date is a rather complex calculation based on Astronomical tables describing full moon dates. Details can be found at [http://www.assa.org.au/edm.html, and http://aa.usno.navy.mil/AA/faq/docs/easter.html]. Note that the Christian Orthodox Holidays are based on the Julian calendar. |
| 3 | JHCHRGFR | JHCHRGFR | Good Friday, is the Friday right before Easter Sunday. |
| 3 | JHCHRNEW | JHCHRNEW | New Year's Day (January 1) |
| 3 | JHCHRPEN | JHCHRPEN | Pentecost Sunday, is seven weeks after Easter (the 50th day of Easter). |
| 3 | JHCHRXME | JHCHRXME | Christmas Eve (December 24) |
| 3 | JHCHRXMS | JHCHRXMS | Christmas Day (December 25) |
| 2 | JHNNL | The Netherlands National Holidays | Description:The Netherlands National Holidays. |
| 3 | JHNNLLD | Liberation day (May 5 every five years) | Description:Liberation day (May 5 every five years) |
| 3 | JHNNLQD | Queen's day (April 30) | Description:Queen's day (April 30) |
| 3 | JHNNLSK | Sinterklaas (December 5) | Description:Sinterklaas (December 5) |
| 2 | JHNUS | GTSAbbreviationHolidaysUSNational | United States National Holidays (public holidays for federal employees established by U.S. Federal law 5 U.S.C. 6103). |
| 3 | JHNUSCLM | JHNUSCLM | Columbus Day, the second Monday in October. |
| 3 | JHNUSIND | JHNUSIND | Independence Day (4th of July) |
| 3 | JHNUSIND1 | JHNUSIND1 | Alternative Monday after 4th of July Weekend [5 U.S.C. 6103(b)]. |
| 3 | JHNUSIND5 | JHNUSIND5 | Alternative Friday before 4th of July Weekend [5 U.S.C. 6103(b)]. |
| 3 | JHNUSLBR | JHNUSLBR | Labor Day, the first Monday in September. |
| 3 | JHNUSMEM | JHNUSMEM | Memorial Day, the last Monday in May. |
| 3 | JHNUSMEM5 | JHNUSMEM5 | Friday before Memorial Day Weekend |
| 3 | JHNUSMEM6 | JHNUSMEM6 | Saturday of Memorial Day Weekend |
| 3 | JHNUSMLK | JHNUSMLK | Dr. Martin Luther King, Jr. Day, the third Monday in January. |
| 3 | JHNUSPRE | JHNUSPRE | Washington's Birthday (Presidential Day) the third Monday in February. |
| 3 | JHNUSTKS | JHNUSTKS | Thanksgiving Day, the fourth Thursday in November. |
| 3 | JHNUSTKS5 | JHNUSTKS5 | Friday after Thanksgiving. |
| 3 | JHNUSVET | JHNUSVET | Veteran's Day, November 11. |
| 1 | PM | PM | Every afternoon at institution specified times. |
| 1 | QID | QID | Four times a day at institution specified time |
| 1 | TID | TID | Three times a day at institution specified time |
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