To find a date 200 days in the future from 12th June, you can follow a simple manual calculation method. Start by adding 200 days to the date 12th June. Since there are 30 days in June, after 18 days (on 30th June), you would have completed one whole month. Therefore, moving forward from 30th June, you are left with 170 days.

Next, considering a full month in the future here, it takes us to 31st July. Subtracting the 31 days from 170 days, you are left with 139 days. Moving ahead 31 days from 31st July lands you on 30th August.

Continuing the process, 30 days remaining from the itsy-bitsy 139 days puts us on 29th September. Proceeding another 30 days from 29th September leads us to 29th October. Finally, advancing 31 days from 29th October concludes with the date 29th November, which marks 200 days in the future from 12th June.