/,.+$/ // This expression matches anything that is after a , if in one line
for a string of this type:
"Friday May 2, 9am"
"jbjbkjbkjb"if
/,.+$/ expression would only match [ , 9am" ] if m flag is enabled i.e. /,.+$/m
. // matches any character except line breaks
+ // match 1 or more of preceding token
$ // matches the end of the string, or the end of a line if multiline flag (m) is enabled