The generally accepted method (AFAIR) is yyyymmddxx,
where xx starts at 00 and is incremented for each change during that day. This
allows for multiple updates in a single day without causing problems for
situations such as 3 updates today followed by one update each day for the next
4 days ... Of course, if you never manually update the zone file, this isn't
really an issue ;)
On 23-Apr-00 Matthew Dillon wrote:
>
> For manual updates of the zone file, I recommend using yyyymmdd rather
> then yyyymmddhhmm, and if you modify it twice in one day just increment
> the day (and hopefully real time will catch up to it again).
>
> For automatic updates (i.e. scripts that update zone files), I recommend
> simply starting the serial number at 1 and incrementing it on every
> update. Trying to make the serial number into a date for viewing ease
> is overrated.
>
Cheers,
Colin
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