Fiesta and Field day

Fiesta noun - A time or program of special events and entertainment in honor of something.

Field day and fiesta are semantically related in feast day topic. In some cases you can use "Field day" instead a noun "Fiesta".

Field day noun - A day for outdoor athletic competition.

Fiesta and field day are semantically related in celebration topic. You can use "Fiesta" instead a noun phrase "Field day", if it concerns topics such as feast day.