When I spoke about the dress code early this year, it was pretty standard. Agents could wear casual clothing like jeans and management have to power dress as expected. I did mention that the policy should reflect the company's culture.

I've noticed that it is changing. As I cruise through the streets of Makati, Ortigas, Quezon City and Marikina during call center operational hours, I can't distinguish management from the agents anymore. I heard from colleagues that jeans is now acceptable, regardless of your rank (not unless a potential client is on site). What's interesting is seeing the "theme days" being used too often. Mind you, it wasn't even Halloween at that time. Yes, management has to follow suit to make sure they support the agents.
If it isn't what you wear, it's the make up or accessories that define call center professionals these days. It isn't a shock to see a group of people smoking outside with some kind of make up or flowers in their hair in the middle of the night. This sometimes make it more interesting and pleasant for clients, to show that the center has a "fun" environment.
Does this mean the dress code policy will be irrelevant? Let's just say management will turn a blind eye and assume it's a theme day. Besides, there are more pressing issues to take care of.