Final answer:
Malala's first blog entry as Gul Makai appeared publicly on Friday, January 3, 2009.
Step-by-step explanation:
The first blog entry of Malala as Gul Makai appeared publicly on Friday, January 3, 2009. This date is mentioned in her memoir, I Am Malala: The Girl Who Stood Up for Education and Was Shot by the Taliban, which was published in 2013. In her blog entries, Malala used the pseudonym Gul Makai to protect her identity while sharing her experiences and advocating for girls' education.