This is probably painfully obvious to anyone who has worked with datetimes
in their applications before, but my first in-the-wild encounter of this
happened in 2025 when validating the database insertion times for some data.
I was delighted when I realized it wasn't a bug in our code but a instance
of the familiar Daylight Savings Time skip ahead.
My parents taught me this mnemonic: In the
Fall you "fall back" an hour. In the Spring, you "spring forward" an hour.
The extra information added by Javascript's toString() function,
including a switch from GMT-0500 to GMT-0400 as well
as from (Eastern Standard Time) to (Eastern Daylight
Time) helps demystify this skip in absence of the social awareness of
the time transition.