"I meet them at midday."
Translation:Buailim leo ag meán lae.
The English sentence could mean regularly or once in the future. The Irish translations would be different, but there is no way to tell which is intended from the English. Casadh le is a perfect synonym of Bualadh le.
Casadh le is past tense, so is more equivalent to Bhuail le.
Also, it declines to who meets. Casadh liom/orm é - I met him. Buail does the opposite - Bhuail mé leis - I met him.