Hi! pacifictonz-san.
Heian Jingu Reitaisai(平安神宮 例大祭)
http://www.heianjingu.or.jp/02/0101.htmlI tried translation of the upper site.
These can be seen also by whom.
(1)Reisai(例祭)15th Apr.AM10:00
Imperial messenger procession
Dancing by a shrine maiden
Dedication of the song by a citizen chorus
(2)Reisai of the next day(例祭翌日祭)16th Apr.
The tea party by selected people(茶会) AM11:00〜PM3:00
Flower arrangement is presented(献花会) AM9:00〜PM3:00
The garden party by a Kou-member( 講 )AM11:00〜PM3:00
The following is a big event.
I think It contains what you described.
Some events are presented(神賑行事)
16th Apr.PM0:00〜PM3:00
包丁式(The ceremony using a kitchen knife)
歌舞 (Dancing by a Maiko)
御神楽(Okagura court dance and music)
箏曲 (A performance of a koto)
舞 (Japanese Mai-dance)
舞踊 (Japanese dance)
太鼓 (A performance of a drum)
舞楽 (Bugaku court dance and music)
I hope this is helpful to you.