Day of the Week Abbreviations
22 abbreviations · part of Units of Measurement Abbreviations
Abbreviations for the days of the week in three-letter, longer and one- or two-letter forms, as seen on calendars, timetables, store hours and class schedules. English day names come from Old English and honor the sun, the moon and Germanic gods who were matched with Roman ones. One-letter schedule codes vary by institution: many US universities use R for Thursday so it cannot be confused with T for Tuesday.
| Abbreviation | Stands for | Description |
|---|---|---|
| F | Friday (schedule code) | Friday's one-letter code on timetables, pharmacy pill organizers and class schedules, as in MWF. |
| Fri | Friday | The last day of the typical working week, named after Frigg (Old English Frige), the Germanic goddess of marriage, who was paired with Venus. |
| M | Monday (schedule code) | Single-letter code for Monday in class schedules, gym timetables and transit charts, as in MWF for Monday, Wednesday and Friday sessions. |
| Mon | Monday | The day after Sunday and the first day of the working week in most countries. |
| MWF | Monday, Wednesday, Friday | A common US college and high school schedule pattern for courses that meet three times a week, typically in 50-minute periods. |
| R | Thursday (schedule code) | Many US college registrars use R for Thursday so that it cannot be confused with T for Tuesday. |
| S | Saturday (schedule code) | A one-letter code for Saturday on calendars and timetables, though it is ambiguous because Sunday also starts with S. |
| Sa | Saturday | Calendar widgets, fitness timetables and course schedules use Sa for Saturday, paired with Su for Sunday. |
| Sat | Saturday | The only English weekday named after a Roman god: Saturn, from Old English Saeternesdaeg. |
| Su | Sunday | Two-letter code for Sunday on schedules and calendar files, used to avoid confusion with S for Saturday. |
| Sun | Sunday | Named for the sun, from Old English sunnandaeg, a translation of Latin dies Solis. |
| T | Tuesday (schedule code) | Timetables and course schedules use T for Tuesday, as in TTh or TR for Tuesday-and-Thursday classes. |
| Th | Thursday | Two-letter abbreviation for Thursday on schedules, calendars and forms, used to separate it from T or Tu for Tuesday. |
| Thu | Thursday | Thor (Old English Thunor), the Germanic god of thunder, gives Thursday its name. |
| Thurs | Thursday | A five-letter abbreviation for Thursday, widely used in handwriting, signs, newspapers and informal schedules because it is instantly recognizable. |
| TR | Tuesday and Thursday | Registrar code for a class meeting on Tuesday (T) and Thursday (R), used by universities whose scheduling systems assign one letter per weekday. |
| TTh | Tuesday and Thursday | Course schedule code for classes that meet on Tuesday and Thursday, usually in 75- or 80-minute blocks. |
| Tu | Tuesday | Two-letter abbreviation for Tuesday on schedules, calendars and date pickers, keeping it distinct from Th (Thursday). |
| Tue | Tuesday | Named for Tiw (Tyr in Norse), a Germanic god of war and law. |
| Tues | Tuesday | A four-letter abbreviation for Tuesday, common in handwritten notes, newspapers, event listings and informal writing on both sides of the Atlantic, where it reads more… |
| W | Wednesday (schedule code) | One-letter code for Wednesday on course schedules, store-hours signs and weekly pill organizers. |
| Wed | Wednesday | The middle day of the Monday-to-Friday working week, named after Woden (Odin), the chief god of Anglo-Saxon and Norse mythology. |
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