Ecclesiastes 3:1 To every thing there is a season, and a time to every purpose under the heaven:
It is this season again. We go thru it every year. Is the purpose of this season what God proposed or what man invented?
God set forth in the Old Testament a series of festivals and tabernacles to be celebrated at certain times. Those traditions are meant for a chosen people who are called by name.
Try as I might to remember anything Jesus told us to celebrate with joy I am hard put to place a time to them, even in the one thing in which He asked to be remembered.
1 Corinthians 11:23-25 For I have received of the Lord that which also I delivered unto you, that the Lord Jesus the same night in which he was betrayed took bread: And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. After the same manner also he took the cup, when he had supped, saying, this cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
As often as you do this is not specific and we have turned it into ritual giving it a name, a place and a time to celebrate that man has determined to be appropriate.
We say grace when we eat because Jesus always blessed the breaking of bread together. That was every time, no specific time but intentional within His character.
Luke 19:43 For the days shall come upon thee, that thine enemies shall cast a trench about thee, and compass thee round, and keep thee in on every side,
The enemy can only do that if you do not celebrate every day with joy and in remembrance of Christ who gave your life.
There is no season to love except now.