When is zakat due on invested money that has only been invested for six months from the start date of the investment? Is the principal zakat paid in Ramadan and the profits delayed, or are both the principal and profit zakat delayed until the end of the Gregorian year?

Zakat is obligatory on invested wealth if it reaches the nisab (minimum threshold) and a full year (hawl) passes on it. It is obligatory on both the principal and the profit together. It is not permissible to delay its disbursement without a valid excuse. The time it becomes due is the hawl of the principal amount (Ramadan in this case). The invested wealth must be calculated, and its zakat paid based on any profit or loss incurred. If it is impossible to calculate the wealth or ascertain its amount at the completion of the hawl, then one must wait until it is received or its amount can be known. Then, its zakat must be disbursed for the period it was out of reach, while considering the hawl of its principal.