Do You Really Need Those Lead Zeros?

The 20s are going to start at 2020 and go through to 2029 because we're naming them after the beginning of the number. One argument is that now the meaning of a decade is just the beginning digit of the last two digits of the year. However, telling a pedant that everyone else says it this way, therefore that must be right is not going to work. So I refuse to say O instead of zero in like phone numbers and dates and very few people have joined in. But whenever there's a number, I never use an O instead of a zero.