The correct expression is “Daylight Preserving Time“ rather than “Daylight Cost savings Time” (with an extra “s”), nevertheless Many people are guilty of saying it the wrong way. The specialized explanation is that the phrase “saving” is singular because it acts as part of the adjective instead of a verb. https://tedomarket.com/product/mens-watches/mechanical-watches-mens-watches/nylon-strap-sport-men-dual-display-wristwatch-fashion-men-quartz-watch-date-time-week-display-army-military-led-display-clock/