Every year we are chnage year repeatedly. Bets solution to use for once year will change automatically.
To Add a dynamic year in the footer copyright section use this mobile under System -> Configuration -> Design. Ability to show a year variable via the Theme Footer configuration
{var date_Y}} use this text instead if year . Ex : © {{var date_Y}} AllDay. All Rights Reserved
Go to Content >> Design >> configuration > [ Select Theme ] > Click Edit > Footer > Copyright
Insert text like 'Copyright {{var date_Y}} Store Name, Inc.' [https://prnt.sc/O0thBu_1USsT ] >>
View the footer on the front end rendered as 'Copyright 2020 Store Name, Inc'