You want the pulse to hit at about 01:00 UTC, or about 18:00 in Los Angeles. Just in time for the evening rush hour.

However, it's not because of rush hour. That's just a happy coincidence.

According to this article the most likely time of day for the sick and elderly to succumb is just before lunchtime. So the pulse should harvest in mid-morning (before that death peak) to maximize the number of zombies.

The largest number of humans on Earth in one time zone are in UTC+8:00, with an estimated population of 1.7 billion or roughly 24% of all humans. It includes all of China. UTC+05:30 has the second-highest population with India and 1.4 billion.

So you want the pulse to hit at about 09:00 Beijing time, which is 01:00 UTC...and 18:00 in Los Angeles.

You want the pulse to hit at about 01:00 UTC, or about 18:00 in Los Angeles (since this is a USA-based story). Just in time for their evening rush hour.

However, it's not because of rush hour. That's just a happy coincidence.

According to this article the most likely time of day for the sick and elderly to succumb is just before lunchtime. So the pulse should harvest in mid-morning (before that death peak) to maximize the number of zombies.

The largest number of humans on Earth in one time zone are in UTC+8:00, with an estimated population of 1.7 billion or roughly 24% of all humans. It includes all of China. UTC+05:30 has the second-highest population with India and 1.4 billion.

So you want the pulse to hit at about 09:00 Beijing time, which is 01:00 UTC...and happens to be 18:00 in Los Angeles.