Daylight Saving(s) Time
Every spring, citizens in many places around the world set their clocks forward an hour to Daylight Saving Time—or is it Daylight Savings Time (with an s at the end of Saving)?
Because the point is the saving of daylight, it seems more correct for it to be Daylight Saving Time, not Daylight Savings Time. (There are not multiple savings.) The singular is the original form and seems to be the standard. However, it’s common for the plural form to be used. Savings is often heard when the time change is mentioned by the media or in conversation. And sometimes Savings is even printed on calendars.
Source: www.grammarerrors.com