MM7 Genie Lamps are found laying on the ground in various open spaces with sand. They will appear on the mini-map if you have Expert Wizard Eye active. Genie Lamps operate similar to the Deck of Fates in Might & Magic VI. The bonus granted is based on Month of the calendar year. The power of the bonus is based on the Day of the Month. A few days of the month grant only a non-beneficial Condition and those days should be avoided.
Any month, Day 5 grants STONED
Any month, Day 7 grants ERADICATED
Any month, Day 13 grants DEAD
Any month, Day 21 grants ERADICATED
Any month, Day 26 grants STONED
Any month, Day 27 grants DEAD
January is the month for MGT
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
February is the month for INT
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
March is the month for PER
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
April is the month for END
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
May is the month for ACY
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
June is the month for SPD
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
July is the month for LCK
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
August is the month for Gold
Day 1-7 (+1000)
Day 8-14 (+2000)
Day 15-21 (+3000)
Day 22-28 (+4000)
September is the month for Food
Day 1-7 (+5)
Day 8-14 (+10)
Day 15-21 (+15)
Day 22-28 (+20)
October is the month for Skill Points
Day 1-7 (+2)
Day 8-14 (+4)
Day 15-21 (+6)
Day 22-28 (+8)
November is the month for Experience
Day 1-7 (+2500)
Day 8-14 (+5000)
Day 15-21 (+7500)
Day 22-28 (+10000)
December is the month for RND Resistance
Day 1-7 (+1)
Day 8-14 (+2)
Day 15-21 (+3)
Day 22-28 (+4)
Attribution
This information can be found in-game with trial and error and resting. Official manual is here for reference.