BE PREPARE...Instead "blogging day"

Timer delays, or "time bombs" are usually employed by an individual who
wishes to threaten a place with a bomb and demand money to reveal its location
and means to disarm it. Such a device could be placed in any populated place
if it were concealed properly. There are several ways to build a timer delay.
By simply using a screw as one contact at the time that detonation is desired,
and using the hour hand of a clock as the other contact, a simple timer can be
made. The minute hand of a clock should be removed, unless a delay of less
than an hour is desired.

This device is set to go off in eleven hours. When the hour hand of the clock reaches the contact near the numeral 5, it will complete the circuit, allowing current to flow through the igniter or squib.

The main disadvantage with this type of timer is that it can only be set for a maximum time of 12 hours. If an electronic timer is used, such as that in an electronic clock, then delays of up to 24 hours are possible.