He joined the Millerites and contributed significantly as a lecturer, a writer, and co-designer of the widely disseminated "1843 chart".
Hale began his work as a Methodist Episcopal minister in Charleston and Medford, Massachusetts,[2] in 1833.
[6] Apollos Hale was instrumental in designing and presenting the "1843 chart" that was used extensively by Millerite lecturers.
[7] Hale also served as an associate editor for the Signs of the Times, and later when it became the Advent Herald, he continued in the same responsibility.
[9] In January, 1845, Hale and Joseph Turner published an interpretation of what had happened on October 22, 1844, in which they articulated what became known as the shut-door doctrine.