Starting July 2 at (7:00am) and until on July 16 (7:00am), completing tasks you will be rewarded with an item Hanky, which you can exchange at NPS at Freedom Harbor
List of tasks and rewards:

Tamer - Taming: A Healthy Diet - Hanky x5

Henry - Today's Personal Luck Quest - Hanky x3.

Henry - World Luck: Solarien's Gift - Hanky x3

Henry - World Luck: Tyara's Blessing - Hanky x3

Michell - Cooking Tutorial - Hanky x 2

Luia - Alchemy Tutorial - Hanky x 2

Rio - Study - Hanky x 2

Porudock - Balloon Bonanza! - Easy Level - Hanky x 5

Rio - Perfumer - Hanky x 3

Buckray - Harbor Guide - Hanky x 2

Guild: Life in the Harbor (must be in guild, completed automatically when completing 5 Free Harbor Life quests, can be done by pet) - Hanky x 2

Auriel - Aquire Shylia's Breath Petals - Hanky x 8

Auriel - Seal Evil Power - Hanky x15