Create stack of your all SMS and SMS Stack will send all your SMS one by one on time.
Now you can schedule - re-schedule your SMS even you can save your messages as a drafts and send or schedule them later.
Now no wife can complain their husband for not wishing her anniversary. Girlfriend can not complain her boyfriend for not wishing her birthday.
Plenty of SMS templates available so you may not have to bother for typing such common SMS.
CSV import will facilitate you to import your precious contacts. Here its format: