How to run scene in selected months every year

[wt 0]

Hello

I need your help. I’m preparing scene, which will control solenoid valve, which provides water to the autonomous sprinkler system.
The problem is in the block system - I can’t set the months in which the solenoid valve is to be open.
Here is what I have done so far. I created a variable named zm_ogrod_zr which take a value 0 or 1 (screen 1).
Next scene is my problem, I would like to cyclically - every year on April 21 changed mentioned above variable to 1, (screen 2)
giving the green light to the scene of the opening solenoid valve (screen 3) and the scene which turn off the solenoid valve during rain (4).
Analogous problem appears in the scene (screenshot 5), where the variable changes the value to 0 and it cause that solenoid valve close down.
To summarize my intention is to write a scene that will open the solenoid valve on April 21 of each year,  and  close down on September 23 of
course each year too. As I know it isn't possible do it all using only block system without LUA. Correct me if I wrong. Please help me.
Solution could be created in block system or Lua (I have HC2).
I attached appropriate screens in this post. Scenes were created in Polish language. Little explanation what is what:

Elektroz.zrasz.g = solenoid valve

Zmienne wyzwalające= variable trigger

Czujnik deszczu = rain sensor.

 

Please login or register to see this attachment.

Please login or register to see this attachment.

Please login or register to see this attachment.

Please login or register to see this attachment.

Please login or register to see this attachment.

Please login or register to see this attachment.