Changing a shader's offset value through scripting!

Hello there,i am building a game and i am using a skybox asset from the unity asset store.I made a trigger object which i want to change the skybox's day to night cycle(that means it's offset value).However i cannot figure out how to do that through scripting.I tried using something like:
renderer.material.SetFloat("_OFFSET", myOffset); but i didn't make it.Any ideas?Here's an image of the object:
:

 

material.SetFloat and friends would definitely be the way to achieve this, are you sure it is named _OFFSET in the shader? Are you certain you have a reference to the correct material?

 

no and that's part of the problem....this skybox is an asset so i do not know what the shader's name is so i can make the reference ....

 

in that inspector, click on the little cog for the shader and choose "edit shader" it should list all the attributes by their names.

 

Only a text property is shown

 

ah, looks like you might need:
https://docs.unity3d.com/ScriptReference/Material.SetTextureOffset.html

and that's "tex" as in texture, not text

 

this was really helpful as far as figuring out the way but i am having an issue...this code alters the offset everytime the update function is called and sets the offset's value between two values but i want it to happen only once and use only one value.