#move mail by date range
#create a new mailbox
mkdir -p ~/.mail/2019/{cur,new,tmp}

#tag mail by date (shift-T to tag)
T
~d 01/01/2019-31/12/2019

#Save tagged to mailbox
# the ';' says to run the next command on tagged mail
# the 's' is the command to save
;s

#either type the name of a new mailbox or '?' for a list of mailboxes
?