The Wikipedia article on Daylight Saving Time uses a few nouns to describe this category. I would scarcely consider any of these "standard" but here is evidence of how people have previously addressed your problem.
DST clock shifts sometimes complicate timekeeping and can disrupt travel, billing, record keeping, medical devices, heavy equipment, and sleep patterns.
The relevant authorities usually schedule clock shifts for, or soon after, midnight and on a weekend to lessen disruption to weekday schedules.
The manipulation of time at higher latitudes (for example Iceland, Nunavut, Scandinavia or Alaska) has little impact on daily life, because the length of day and night changes more extremely throughout the seasons (in comparison to other latitudes), and thus sunrise and sunset times are significantly out of phase with standard working hours regardless of manipulations of the clock.
time regulation (This is more of a stretch – the author does not use it as you intend – but is a reminder that daylight saving time is a policy.
In 1810, the Spanish National Assembly Cortes of Cádiz issued a regulation that moved certain meeting times forward by one hour from May 1 to September 30 in recognition of seasonal changes, but it did not actually change the clocks.
Clock shift is used most frequently in the article and, in my judgement, is pretty intuitive. It does not very well describe jurisdictions which permanently have switched to DST, but in those cases timezones probably fit better anyway.