When can I buy SPX options?

Excuse me, could you please clarify for me when exactly I would be able to purchase SPX options? I'm quite interested in exploring this opportunity, but I'm unsure of the specific timeframes or market conditions that might influence when they're available for trading. Would there be any particular days or hours that I should be aware of, or are there other factors that could impact my ability to make a purchase? I'd appreciate any guidance you can offer on this matter.