December 2017
Publication of "Hangeul, Letters from Heaven"
2018–2021
Lectures by Kyu-Hyun Park on "Hunminjeongeum Jejahye" and Rudolf Steiner's Language Theory
October 2021
The 1st Hangeul Day Commemorative Event (50 offline participants)
January 2022
National Teacher Training on Jeongeum Hangeul Literacy Instruction (60 online/offline participants)
February 2022
Founding of the Jeongeum Hangeul Education Alliance
August 2022
Publication of "The Child Who Planted Sound Seeds" by Jae-Ho Wi
October 2022
The 2nd Hangeul Day Commemorative Event (60 online/offline participants)
February 2023
National Teacher Training on Jeongeum Hangeul Literacy Instruction (80 online/offline participants)
Publication of the 1st Resource Book of the Jeongeum Hangeul Education Alliance
March 2023
Publication of "Heavenly Letters, Hangeul: A Workbook for Learning Individual Letters" by Su-Yeon Shin
October 2023
The 3rd Hangeul Day Commemorative Event (130 online/offline participants)
Unveiling of the Hangeul poem "Hangeul, Letters from Heaven" by Kyu-Hyun Park
Composition of the song "Hangeul, Letters from Heaven" (Music by Jae-Ho Wi, Lyrics from Kyu-Hyun Park's Poem)
November 2023
Publication of "The Great Hangeul Adventure in Peach Village" by Eun-Sook Lee, Young-Ju Lee, Eun-Hye Ju, and Sang-Hee Hwang
January 2024
National Teacher Training on Jeongeum Hangeul Literacy Instruction (83 online/offline participants)
Publication of the 2nd Resource Book of the Jeongeum Hangeul Education Alliance
April 2024
Publication of the translated book "The World of Fairy Tales" (Original author: Daniel Udo de Haes, Translator: Un-Tae Kim)
October 2024
The 4th Hangeul Day Commemorative Event (70 online/offline participants)
November 2024
Release of the non-commercial book "Our Future, Old Stories: The Hangeul and Math Exploration of Bachelor Donghae and Maiden Suwol" by Hyun-Hwa Oh, Young-Chae Yoon, Ji-Hye Lee, and Nam-Soon Jung (A storybook for 1st-grade Jeongeum Hangeul and Math instruction)
Release of a new composition for the song "Hangeul, Letters from Heaven" by Ji-Hyun Choi (Lyrics from Kyu-Hyun Park's poem)
January 2025
National Teacher Training on Jeongeum Hangeul Teaching Methods (48 online/offline participants)
Publication of the 3rd Resource Book of the Jeongeum Hangeul Education Alliance