Do all towns get attacked at the same time

So far, I know of the following:

• Water. This only works once per day.
• Food. This only works once per day. (Note, that some food, such as a Meaty Bone can cause an Infection which could get you killed!)
• Drugs. Most drugs will restore AP to full, however, while under the influence, your forum posts will be affected, and there is a chance of addiction. Once you are addicted, if you do not take drugs every day, you will die.
• Alcohol. This only works once per day. Drinking will refill your AP gauge, but it will inhibit your ability to perform some tasks, including searching, combat, and posting to the forum. The day after drinking, you will be hungover and unable to consume alcohol.
• EMS System. This can only be used if you are not injured. Consumes 1 Battery, restores AP to 5, and instantly injures you.
• Dice. Can be used once per day, small chance to restore 1 AP via scales and triples.
• Cards. Can be used once per day, small chance to restore 1 AP via aces and queen of hearts, smaller chance of terrifying you.
• Siesta Time™ (hero only). The basic version of this house improvement gives you a daily 33% chance of recovering 2 AP per day.

If you have a cyanide tablet available to you, you can suicide instantly.

The alternative options are myriad, but slower. The most obvious choice is waiting for nightfall. Just wait outside the city gates. Zombies will happily oblige you.

Note that dying of suicide or outside the gates at night will cause any achievements from the previous day to be lost (it's considered not living through the whole day). If you're really feeling evil, you could open the gates right before the attack to avoid this (and possibly get the last man standing achievement). EDIT: As LessPop points out, the portal lock prevents this. You could still try your luck, opening the gate right before 23:40 and hoping nobody notices.