Needs to go back further - there were shutdowns 30 years ago
Hilariously, prior to that law, the executive branch would overspend early in the year, forcing more spending from congress in order to meet their contracts [2].
[0] https://en.wikipedia.org/wiki/List_of_United_States_federal_...
[1] https://en.wikipedia.org/wiki/Government_shutdowns_in_the_Un...
[2] https://en.wikipedia.org/wiki/Antideficiency_Act#Provisions, https://en.wikipedia.org/wiki/Coercive_deficiency