"This Time's For Fun" not showing up for me-Halatali (Hard)

[Yasminou]

I don't see how clearing Sunken Temple of Qarn (Hard) can be mandatory for unlocking Halatali (Hard) since Halatali (Hard) was released in 2.2 and Sunken Temple of Qarn (Hard) in 2.4. However, finishing Halatali (normal) is required. Check that you have indeed done that (I think it is unlocked in Vesper's bay) and that the corresponding quest is completed.

In general, for hard mode dungeon, you need to have finished the 2.0 MSQ (3.0 for lv 60 hard mode) and have finished the normal mode dungeon. The latter requirement is only specified if the normal mode dungeon is not in the MSQ (Halatali, Sunken Temple of Qarn, The Wanderer's Palace, Amdapor Keep for the lv. 50 dungeons).