No, as an organized group Jehovah's Witnesses were a recongnized religion long before this date however 1931 was when this group (formally know as "bible students" or IBSA International Bible Students Association) formally adopted the name of JEHOVAH'S WITNESSES.
In 1931.
The religious organization know know as the Jehovah's Witnesses was formed in the late 1800's , however the name "Jehovah's Witnesses" was adopted in 1931, they were formerly know as the "International Bible Students"
Yes, Jehovah's Witnesses first officially adopted the name in 1931 based on Isaiah 43:10-12.
Jehovah's Witnesses are called Jehovah's Witnesses. They adopted this name in 1931. See related links for more information.
3 March 1931 by Congressional resolution
The syringa was appointed as the official state flower of Idaho in 1931.
It's been the official US anthem since 1931.
It was declared the official national anthem in 1931.
It was made the official national anthem on March 3, 1931.
The "Bible students" as the Witnesses were then known, realised the need to be united under one name and the need to publically the divine name, they thus adopted the name "Jehovah's Witnesses".
No, according to the publication "Jehovah's Witnesses Porclaimers of God's kingdom" pub. 1993 p. 200:"For years, Bible Students wore a cross and crown as a badge of identification, and this symbol was on the front cover of the "Watch Tower" from 1891 to 1931. But in 1928 it was emphasized that not a decorative symbol but one's activity as a witness showed he was a Christian. In 1936 it was pointed out that the evidence indicates that Christ died on a stake, not a two-beamed cross."
Key wrote the words in 1814, which were soon set to the tune of a preexisting song. It became the official anthem in 1931.