Leaving work before clocking off time under the pretence of having started earlier than usual or claiming to be working the extra hours at a later time.
Mike: "I started two hours earlier this morning so I'm going home at 2pm today"

Glenn: "Taking another Jackson Day eh?"

Mike: "Stop spreading malicious lies"
by justanotherobserver June 15, 2011
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When a hardcore fan of Michael Jackson spends the entire day of June 25th (the day of Michael Jackson’s death) listening to his music.
It’s Michael Jackson day, let’s listen to his music.
by Rick Grimes 35 June 25, 2021
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National Percy Jackson day is October 8th. To celebrate, draw a trident on your forearm.
Me: Did you know its National Percy Jackson day?

Person A: Yeah! I drew a trident on my forearm to celebrate.
by Your_WorstNightmare_ October 14, 2016
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On April 22, we celebrate anybody but those named Jackson bc fuck you jackson
Guy 1: “Hey, today is National anybody but Jackson appreciation day”
Jackson: “Why do you hate me.”
Guy 1: “Because fuck you Jackson.”
by Shlongdong_69 April 22, 2020
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National Sienna Leigh Jackson Day is on the 30th of June, on this day everyone must be friendly to Sienna Jackson and bring her gifts if you would like to give her something for her special day! This day is for one individual called Sienna Leigh Jackson
Do you know what day it is today?
It's National Sienna Leigh Jackson Day
by Lee Thomas Harwood May 23, 2022
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