Daylight savings was invented by people who thought you could take time off the start of the day, tag it on the end and have a longer day. IT IS AN ABOMINATION UNTO NUGGAN.
However leap seconds and suchlike are a necessary evil, otherwise you end up with calendar year slowly drifting through the siderial year. Not adding a leap second will very, very, very slowly cauyse havoc with calendars and lead to some future generation having to reset the calendar to make it match the siderial year again, as with the Gregorian to Julian calendars. Our descendants in the year 28822 will rue the day we stopped adding leap seconds.