If you took the time to read the above cited thread on this topic, you would have seen that someone else has already raised this point, and, that it has been debunked.
Hate to break this to you, but, people have been saying ‘savings’ so often, that I’ve got a usage cite and three dictionaries that says the ‘s’ is OK. Besides, daylight savings edged out daylight saving in a Google fight.
The Columbia Guide to Standard American English
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Peace.