Days of the Sun are even number days (2,4,6...)
Days of the Moon are odd (1,3,5...)
Days of the Sun are multiples of 5 (5,10,15...)
Example: March 20th is a day of the star.
The bonus exp gained from a certain day is given from the target of the day; the bonus is
not affected by which map you are on is set as.
Target of the sun gets the largest EXP boost on its day, but can only be set to large monsters with HP over 20K.
Teggit suggests to set Thor as a map of the Sun because Comfort of the Sun adds vit def -- which is more useful than the ASPD bonus added if you set Thor as star.
Hatred increases damage dealt on the target of the day by a formula involving DEX, LUK, and base level.