Calendar was a neat idea, just like it was in Winter Event, BUT again its just too hard to get every day, you can't get a shard on Day 1, without ultimate luck of a shard is even close to the beginning of the tomb. You have to complete 6-7 quests, so you can get enough Scrolls to buy the best Tool package. What player will sacrifice a Lvl 10 Ferris Wheel to search for shards every day? Search for Idols Idols Idols, get as many upgrades for the Ferris Wheel as you can. Looks like the calendar prizes are the same as Winter Event calendar as well, meaning they aren't worth the effort and certainly not worth diamonds. After Day 2, I used all my tools, and know trying to save up for the next tool package, Day 3 passed and not even a chance to dig. Sorry, but again, I do like the idea of the calendars, just doesn't make sense to try to pace yourself everyday to just find a Shard, when we can gather Idols which are more common in the Tomb