Anyone familiar with annual/seasonal sales of the different airlines?

Hi! To help everyone out who likes to plan in advance, may familiar ba sa mga months na nagkakaroon ng sales?

Ang alam ko lang usually kapag 11.11 talaga may sale. 12.12 din ata but not as big as 11.11.

I heard may mga anniversary sales din ang PAL , CebuPac, etc pero di ako familiar sa months. Some say March ito pero di ako sure.

Would appreciate any advice. Also if alam niyo rin ano coverage ng sales, like yung 11.11 anong months naging coverage niya ng sale?

Maraming salamat. 🙂