Diwali is not a marketing plan.
Everyone sends the same greeting on the same morning. The ones that sell went out a week earlier and had a reason to exist.
Templates get approved in advance, so the season does not catch you out.

A calendar of the moments that actually move your business, a message built for each one, and the numbers afterwards showing which was worth repeating.
The year has more than one peak
Four moments, not one
The greeting on the day is the least valuable message in the set.
Give them time to decide
This is the message that sells, because it lands while there is still room to plan and budget.
Use the deadline you actually have
Not an invented countdown. A real cut-off, like the last day you can deliver on time.
Say one warm thing and sell nothing
This is the message that buys you permission to send the other three next year.
Ask what comes next
The list you build now is what makes the next season cheaper to run.
Who runs this
Anyone whose revenue has a shape to it across the year.
Where this stops working
A greeting with your logo on it is not a campaign. No offer, no reason and nothing to tap makes it a postcard, and on WhatsApp postcards get you blocked. Send the greeting because you mean it, and put the selling in the other three messages.
Questions people ask
Will festival messages annoy people?
They will if you send four greetings and no reason. The sequence above sends one greeting and three messages a customer can act on, which is close to the opposite problem.
Do we need approved templates for this?
On WhatsApp, yes. Anything you send first has to be an approved template, and approval takes a day or two. That is why this work happens the week before, not the morning of.
What if our peak is not a festival?
Then use yours. Admission season, appraisal cycles, monsoon, the end of the financial year. The structure holds: warn early, give a real deadline, say something human, then ask what is next.
Plan the next one properly.
Tell us which season matters most to you. We will map the four messages and get the templates approved before it arrives.