Add custom format to dotfile?

[unknownbreaker]

I am not great with vimscript, but I wanted to know if there is a way to save a custom format so that it is portable through the .vimrc.

[rddunphy]

You can do this using autocommands:

augroup dateformats
	autocmd!
	autocmd VimEnter * silent execute 'SpeedDatingFormat %d/%m/%y'
augroup END