| Abbreviation | Definition |
|---|---|
| FR | FReitag |
| FR | Friday |
| FRI | Friday |
| FT | Fat Tuesday |
| GF | Good Friday |
| GUTS | Gather Up The Strength |
| GYSD | Global Youth Service Day |
| HBD | Happy Birthday |
| HD | Happy Day |
| ICFB | Ice Cream for Breakfast |
| ICUD | International Credit Union Day |
| IDCW | International Document Conversion Week |
| IDGAFWAMFTISWIS | I Don't Give A F**** What A Mother F*** Thinks I Said What I Said |
| IFD | International Forgiveness Day |
| IFFD | International FireFighters Day |
| IMBD | International Migratory Bird Day |
| IMLD | International Mother Language Day |
| INDD | International No Diet Day |
| IRD | International Recognition Day |
| IRD | International Reunion Day |