U.S. President Donald Trump sent a happy birthday message to North Korean leader Kim Jong Un, South Korea’s national security adviser Chung Eui-Yong said Friday.

Chung, who met Trump in Washington this week, told reporters that he was given a message to pass to North Korea and it was delivered Thursday.

“The day we met was Kim Jong Un’s birthday, and President Trump remembered this and asked me to deliver the message,” Chung said upon arrival back in South Korea.

Kim’s birthday is believed to be Jan. 8, though his secretive regime has never confirmed the date. The U.S. government lists Kim’s birth year as 1984, making him 36 years old this year.

Chung did not say if it was a written message or whether it included anything beyond birthday wishes.

FILE – Then-U.S. National Security Adviser John Bolton, left, talks with South Korean National Security Adviser Chung Eui-yong during a meeting at the presidential Blue House in Seoul, South Korea, July 24, 2019

On Wednesday, Chung also met the U.S. special envoy for North Korea, Stephen Biegun and “reaffirmed close U.S.-ROK coordination on North Korea,” State Department spokeswoman Morgan Ortagus said, using the initials for South Korea’s official name the Republic of Korea.

The two also discussed recent events in the Middle East and their coordination on global security issues.

South Korean Foreign Minister Kang Kyung-wha will meet U.S. Secretary of State Mike Pompeo in California next week, along with their Japanese counterpart, Toshimitsu Motegi, and North Korea and South Korea-Japan relations will be on the top of the agenda.

South Korean President Moon Jae-in said Tuesday there is an urgent need for practical ways to improve ties with North Korea, adding that he was ready to meet its reclusive leader in North Korea.