Some brands are out of touch with their audience. For exampke:
Would you still post promotions on a Maundy Thursday and Good Friday?
Some brands have to refresh their knowledge about their audience. Ideally knowing that their audience are experiencing at a certain day and time to also know how to talk to them and what craft the brand experience for their audience.
As for the question of posting promotions on Holy Week? Ideally, no. You shouldn’t.
Social media blackout should be implemented. It’s out of respect for their newsfeed. Post a signoff if needed and start posting again this Saturday.
Give your audience a break. There’s a thin line between being a #RebelBrandand an insensitive brand.