Shopify - Hide discount code field at checkout - for a 48 hour sale

Job ID: 32406809

Budget: $30 – $250 AUD

We have a sale starting at 6am 21.12.21 AEST.
We need to temporarily remove (hide) the discount code field box at checkout. So no customers can add any discounts or store credits.
The sale will end midnight 22.12.21, so I need it then to be unhidden and placed back on the check out. As the sale will be over, and customers should be able to use their discount codes again.
I do not want this to be done via an app. Needs to be coded.
ONLY APPLY:
if you have done this before, and you are available at those times to manage the turning off and on, incase there is a problem.
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