According to the caption on the picture, when was the photo taken?

According to the caption on the picture, when was the photo taken?

1. July 19 2018
2. February 1 2017
3. 43588
4. December 7 2015
5. August 15 2014

Jawaban: C. 43588.

Dilansir dari Ensiklopedia, according to the caption on the picture, when was the photo taken 43588.