Examples and resource links for the Linux date command.
I rarely ever use the date command, but when I need it I almost always struggle to get the right incantation. So, wrote a blog post for easy reference.
I'm addition to tldr which someone else suggested, there's also the cheat command. It's pretty easy to add to it's cheat sheets, if you have custom commands, or want to keep a specific example. I've never kept a physical cheat sheet... They're just too inconvenient and my fingers are probably already at the keyboard.
date is the command for setting the system date and time from the command line. Nothing to do with formatting, beyond the fact that it presumably applies system locale settings when echoing date-time info.