Creo que sería bueno que solicitaras que te aclararan el horario del swing shift porque, por ejemplo, en los hospitales así le llaman cuando trabajan un período en el turno de día y otro en el turno de noche.

swing shift
/ˈswiNG ˌSHift/
nounNorth American
noun: swing shift; plural noun: swing shifts

a work shift from mid-afternoon to around midnight.

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"Swing shift," usually considered to mean the hours between around 4 p.m. until midnight, is an American coinage evidently born during World War II. Such shifts apparently were called "swing shifts" because they seemed to "swing" between the established day and night shifts.

Swing Shift | Definition of Swing Shift by Merriam-Webster
https://www.merriam-webster.com/dictionary/swing shift

Definition of swing shift. 1 : the work shift between the day and night shifts (as from 4 p.m. to midnight) 2 : a group of workers in a factory operating seven days a week that work as needed to permit the regular shift workers to have one or more free days per week.

Swing shift definition and meaning | Collins English Dictionary
https://www.collinsdictionary.com/us/dictionary/english/swin...

Swing shift definition: a group of workers who work a shift from late afternoon to midnight in an industry or... | Meaning, pronunciation, translations and examples.

It depends on what the hours actually are here, but the following scheme might be a solution for you:

AM shift = turno diurno
swing shift = turno vespertino
PM shift = turno nocturno