The construction on the transmitter tower began on March 1953. WDAY-TV began test broadcasts on May 28, 1953, and officially started its daily schedule on June 1, 1953, as the second television station in North Dakota (after KCJB-TV, now
KXMC-TV, in Minot) and the first in Fargo and the eastern part of the state. It was owned by a group of Fargo investors led by Norman Black, owner and publisher of
The Forum. It took its call letters from
WDAY radio, which was owned by
The Forum from 1935 to 2024. Black bought the remaining shares in 1958. It originally carried programming from all four networks of the day–
CBS,
NBC, ABC and
DuMont. However, it was a primary NBC affiliate owing to its radio sister's long affiliation with NBC radio. It lost CBS to
KXJB-TV (channel 4) in 1954, lost DuMont later in 1955 as that network was winding up operations, and lost ABC in 1959 when KXGO-TV (channel 11, now
KVLY-TV) signed on. In 1983, WDAY-TV swapped affiliations with channel 11, then known as KTHI-TV, and became an ABC affiliate. Although it was apparent that Fargo and Grand Forks were going to be a single market, channel 6 did not cover the northern portion of this vast market very well. It was required to conform its signal to protect
CBC Television's Winnipeg station,
CBWT, which took to the air on channel 6 a year after WDAY-TV signed on. As a result, it was barely viewable in northern Grand Forks and could not be seen at all in much of the northern part of the market. To solve this problem, it signed on WDAZ-TV in 1967 as a semi-satellite for the northern portion of the market. WDAY-TV and WDAZ-TV began operating
cable-only WB affiliate "WBFG" in 1998. WDAY/WDAZ replaced
The CW Plus successor of "WBFG" with the Justice Network (which moved from 6.4) on new digital broadcast subchannels WDAY 6.2 and WDAZ 8.2 on September 12, 2016, and WDAY'Z Xtra (which launched in 2013) on digital subchannel 6.3 in the Fargo area and 8.3 in the Grand Forks area. WDAY-DT4 returned to the air in 2017 as an affiliate of
Ion Television. WDAY-TV is one of the westernmost stations in the country whose call sign begins with W. Most stations west of the
Mississippi River begin with K; however, WDAY radio signed on in 1922, a year before the U.S. government moved the K-W boundary from the state borders between 102 and 104 degrees West longitude (including the North Dakota–Montana border) to the Mississippi River. ==WDAY X==