Guild Wars 2

Will I still be able to turn my Advanced Spinal Blades into Tempered Spinal Blades (and later the Infused version) after Escape from Lion’s Arch is over? Is there a time limit?

If you get the recipe, and enough blade shards, you should be able to do it at any time afterwards. The only recipes so far that has been deactivated were the original mystic forge halloween skins once halloween rolled around once more.