the Anniversary Feasts were Seasons of Rendered Unavailing by the Impiety of the Jews
Source: TTT
Isaiah 1:13, 14
Bring your worthless offerings no more; your incense is detestable to Me—your New Moons, Sabbaths, and convocations. I cannot endure iniquity in a solemn assembly. / I hate your New Moons and your appointed feasts. They have become a burden to Me; I am weary of bearing them.
Amos 5:21
“I hate, I despise your feasts! I cannot stand the stench of your solemn assemblies.