Is a swing shift the same as an evening shift?

Often. The American Heritage Dictionary puts it between the day and night shifts, usually 16:00 to midnight, but some EDs also call 11:00 or 12:00 starts swings.

Do residency rules treat mid and swing shifts differently?

No. ACGME's emergency medicine requirements cap residents' ED shifts at 12 continuous scheduled hours and require a break at least as long as the scheduled shift, whatever the shift is called.

Swing shift and mid shift

Updated October 8, 2026 · 2 min read

A swing shift and a mid shift both start between an ED's main shift changes, so they overlap the teams on either side. A swing shift usually starts in the afternoon and runs into the late evening, such as 15:00 to 23:00; a mid shift starts late morning or at midday, such as 11:00 to 21:00. Names vary between groups, so go by the clock times.

An ED example

A fictional ED runs 12-hour day and night shifts and adds a mid and a swing so more physicians are on in the afternoon and evening.

Example: one fictional ED's physician shifts
Shift	Hours	Length
Day	07:00 to 19:00	12 h
Mid	11:00 to 21:00	10 h
Swing	15:00 to 01:00	10 h
Night	19:00 to 07:00	12 h

Counted hour by hour, this department has one physician from 01:00 to 11:00, two from 11:00 to 15:00, three from 15:00 to 21:00 and two from 21:00 to 01:00.

Swing shift

In general American usage, the swing shift falls between the day and night shifts. The American Heritage Dictionary gives its usual hours as 16:00 to midnight.

EDs use the word more loosely. One EM residency lists swing shifts of 11:00 to 23:00, 15:00 to 23:00 and 17:00 to 01:00 between its day and night shifts. Another starts its main shifts at 07:00, 15:00 and 23:00 and adds swings at 12:00 and 18:00.

Trauma services use it too. Over 10 years at one Australian level 1 trauma center, more full trauma team activations fell in a 12:00 to midnight window than in the 07:30 to 19:30 day shift or the 19:30 to 07:30 night shift.

Mid shift

A mid shift starts after the day shift and overlaps it, usually from late morning or midday into the evening, like the 11:00 to 21:00 shift in the example above. There is no single published definition.

A 2022 survey of ED nurses in Southern California grouped respondents into day, mid and night shifts. The authors note that mid-shift nurses start and finish during busy times and take breaks outside the usual times.

The two names overlap: the residency above calls an 11:00 to 23:00 shift a swing, while other groups call a late-morning start a mid. Go by the clock times.

Watch the turnarounds

Late-ending swings make short turnarounds easy to create by accident. A swing that ends at 01:00 followed by a 07:00 day shift leaves 6 hours off, and one ending at 23:00 leaves 8. Both are quick returns, which research defines as 11 hours or less between shifts. Check a run of shifts with the rest between shifts calculator.

In Capillary, saving a schedule checks each person's minimum rest and overlapping shifts, including shifts at another site.

Common questions

Is a swing shift the same as an evening shift?: Often. The American Heritage Dictionary puts it between the day and night shifts, usually 16:00 to midnight, but some EDs also call 11:00 or 12:00 starts swings.
Do residency rules treat mid and swing shifts differently?: No. ACGME's emergency medicine requirements cap residents' ED shifts at 12 continuous scheduled hours and require a break at least as long as the scheduled shift, whatever the shift is called.

Build your ED schedule with rest checked on every save.

Capillary checks role, overlapping shifts and rest, including shifts at other sites, before anything is published or traded.

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