A 5/29 Insurrectionist who has been sentenced to prison is asking for "time served".
Firebombing Attorney Begs for Light Sentence
There were no insurrections nor attempted insurrections in the USA on 29 May of any year in the last century, as far as I can tell.
Firebombing a police cruiser is a serious crime, but it's not an insurrection unless it's in the context of an attempt to seize governmental authority.
And the principle of backdating custodial sentences to the date on which the criminal was first remanded is widespread, and in no sense newsworthy or remarkable for anybody with a passing familiarity with legal processes. It's in no sense a lightening of a sentence, to recognise that it's already been partially served.