When did the organization of Seventh-day Adventists begin?

The organization of Seventh-day Adventists began in 1863, making this the correct answer. This year marks a significant milestone as it was when the denomination formally established itself. The movement itself, which included a blend of Reformist and revivalist ideas, emerged from the Millerite movement following the Great Disappointment of 1844, but it was not until 1863 that the official structure and governing bodies were established.

In that year, the General Conference was formed, setting the foundation for the church's organizational framework, governance, and mission. This provided a unified structure for the various groups who had previously been loosely associated in their beliefs and practices.

The other dates mentioned have importance in the history of the Seventh-day Adventist Church, but they do not signify the actual organization. For instance, 1844 is noted for the Great Disappointment, a critical event that led to the formation of the beliefs that the church would later adopt, while 1888 is recognized for significant theological discussions and events such as the Minneapolis General Conference. The year 1901 was marked by reorganization and restructuring within the church but came after the initial establishment in 1863. The formative year of 1863 is therefore crucial in defining the beginning of the