To find a date 100 days in the future from April 18th, you can employ basic arithmetic calculations. Begin by counting the days from April 18th: add 82 days in April (100 – 18 days) reaching April 30th. Then, move to May, adding 31 days from the 1st, followed by 39 days in June. This process results in July 27th as the date 100 days from April 18th.