- a day devoted to outdoor sports or athletic contests, as at a school.
- an outdoor gathering; outing; picnic.
- a day for military exercises and display.
- an occasion or opportunity for unrestricted activity, amusement, etc.: The children had a field day with their new skateboards.
- a day spent in some special outdoor activity, such as nature study or sport
- a day-long competition between amateur radio operators using battery or generator power, the aim being to make the most contacts with other operators around the world
- a day devoted to manoeuvres or exercises, esp before an audience
- a day or time of exciting or successful activity
- Australian
- a day or series of days devoted to the demonstration of farm machinery in country centres
- a combined open day and sale on a stud property
