If you’re talking about Living Flame, it was available for Horde initially from 21:30~ and then for Alliance too until noon later that day.
Spamming ragetopics doesn’t change these facts that you did had time as many did manage to enter or it wouldn’t have locked due population controls.
It is 9:30PM to 11:59AM. Or in 24H timers: 21:30 to 11:59.
Compared to regular Classic realms, there are many that turn into single mono factions or mega realms and the rest are dead. Even you said in this post to shut down 18 other low realms just so you can get 3 new SOD realms, like, really?
Sorry, survive? Accessing a particular realm is not a right or a basic survival needs. I recommend to re-prioritise your needs.
Blizzard sells gametime for access to the servers, they did not say you will have specific access to 1 realm at 1 game type. Classic games are included for free at no additional cost.