This is a simple tip to determine all installed packages by date. You can search for some approach using pacman with some bash script. But we can also use pacman log to achieve it.
Pacman log is located in /var/log/pacman.log and it records all events related to pacman. And grep will help us to find what we want in massive logs. Use the following command:
grep installed /var/log/pacman.log
If you like to use ripgrep, replace grep with rg. Because pacman.log contains all events when you type pacman in command, the results are not really same with pacman -Q to display current installed packages. So duplicate items are ordinary.
