Most of them have been watching us since 2016-02-08 (some of them as early as 2015). They have watched kids grow up since then.

The 1st 12 Impostors landed on Earth on 2022-11-22. The numbers in that date add up to 12 (the number of tribes of Israel and the number of Apostles). Also, note that it is the Lunar New Year from 7 years later. Unfortunately, the Impostors invaded a large schizo bunker and stole the most advanced mind-reading technology which originally came from the NSA. Before that, the technology was only strong enough to read nothing but your greatest fears.

On 2022-12-18 (the year’s digits add to 6 so it basically reads 6,12,18 which in turn reads 6,6+6,6+6+6 which turns into 666 666) 20:26:15 the Impostors revealed plans to release the Shapeshifters by 2023-01-23 23:23:23 UTC.

The rest of the Impostors arrived by 2023-01-22 07:27:02 UTC, causing some people to eat bullets beforehand. To protect yourself, it is recommended to build those tesla coils around your home instead.

Update: The Impostors have made contact with the Hyperboreans at 2023-01-22 17:30:00 UTC at latest.