Kim Yo-jong is also one of the many high-level North Korean officials facing sanctions from the US - but she should be able to travel to the games since she isn't internationally blacklisted. South Korean government sources say Pyongyang held its military parade at 10 a.m.
Experts say it's likely North Korea will continue to ignore U.S. demands for it to halt its nuclear and missile programs.
North Korea last tested a missile in November, 2017.
The DPRK changed the official date for celebrating the founding of its armed forces from April 25 to February 8 to emphasize the role played by DPRK founder Kim Il Sung in building up the KPA into a regular armed force from a guerrilla force in 1948.
Korean People's Army (KPA) soldiers march on Kim Il-Sung square during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung in Pyongyang on April 15, 2017.
The latest satellite imagery, taken Tuesday, showed 13,000 troops rehearsing at a training facility on the outskirts of Pyongyang, along with around 150 tanks and other armored vehicles, according to respected United States website 38 North.
Pyongyang normally invites hundreds of foreign journalists to show off the spectacle to the world - although it has not done so on this occasion.
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The White House has also cautioned against reading too much into remarks Pence made en route to Japan. President Donald Trump and Pyongyang swapping nuclear threats.
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A White Helmet spokesperson said that "attacks like this, in violation of UN Security Council resolutions, happen with impunity". Almost 200 people were wounded, and rescuers said many of those probably will not survive because of lack of medical supplies.
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Ynet reported that police are split on whether they have evidence to bring charges against Netanyahu on that that case. The feud comes as local media are reporting that police plan to recommend indicting the Premier as early as next week.
Pence shied away from public criticism of Moon when they met Thursday evening, congratulating South Korea on hosting the games and pledging continued support in addressing the North's nuclear threat.
The official made the comment after U.S. Vice President Mike Pence did not rule out the possibility of having contact with North Korean officials as he leads a U.S. delegation to the Olympics.
"To that end, I'm announcing today that the United States of America will soon unveil the toughest and most aggressive round of economic sanctions on North Korea ever", Pence said, speaking at a news conference following a meeting with Japanese Prime Minister Shinzo Abe. "We will not allow North Korean propaganda to hijack the message and imagery of the Olympic Games", he said in Japan earlier this week. It wasn't immediately clear whether Kim Yo Jong will meet with Moon, a liberal who has expressed a desire to reach out to the North.
"We told the skaters to prepare for a version without the lyrics to avoid political controversy and to perform while we wait for the IOC's decision", a spokesman for the Korea Skating Union said.
That will be just nine hours before the opening ceremony.
It turned out that North Korea's first two ICBM launches were carried out by KN-17 missiles paired up with a second stage, a development that caught US officials by surprise.
And if the high-level North Korean delegation flies to South Korea, it would flaunt global rules again. In Canada, you can stream stream the Olympics live using the CBC Sports App (called the "CBC Olympics App" for the duration of the Games) on your phone or tablet. "We don't feel any need to do so either".