Many Facebook users set time zone wrong. This incorrect setting could be the reason you see the time in your profile is inaccurate.
The time and date settings are available by being able to access the personalization portion of the Facebook account. To gain access to this subsection, a person should click “Settings” using their webpage after which click “Timeline and Tagging Settings”. Once within the Timeline and Tagging Settings, a person can set their preferred time and date formatting that will affect all posts moving forward.