Is the '5' ever silent in a countdown?

For the purposes of narrating the sequence of events to the general public, I have noticed that the "5" is often skipped to announce that the ignition sequence has begun. I don't think this is in any way official—it just adds to the drama. read more

In the actual countdown procedure, the Test Director announces the countdown times over the communications net at 5 second intervals starting at about T-60 seconds (I think that’s the start time, it’s been quite a while since I looked in that procedure) and once per second from T-10 seconds to zero. read more

The countdown starts at T-4 hours, which because we want to include some holds, will occur at L-6 hours. We have included two holds. The first hold is between the initial system tests and the fueling. read more

In many New Year's Eve celebrations, there is a countdown during the last seconds of the old year until the beginning of the new year. In Times Square on New Year's Eve, besides the 60-Second Countdown at 11:59 P.M., there are six 20-second hourly countdowns in which people can practice their countdown skills from 5:59 P.M. to 10:59 P.M. read more