Spring in Poland

Today in Poland it's the first day of spring. :) The weather is great, it's warm (it's about 20 degrees) and very sunny! I hope that winter won't come back. I am very happy!! :))

Spring in Poland

It is the first day of Spring in Poland today.Today in Poland we have a first day of spring. :) The weather is great, it's warm (it's about 20 degrees) and very sunny! I hope that winter won't come back. I am very happy!! :))

Spring in Poland

Today in Poland we have it is a the first day of spring. :) The weather is great, it's warm (it's about 20 degrees) and very sunny! I hope that winter won't doesn't come back. I am very happy!! :))

Zach makes a good suggestion to change the first sentence to "Today in Poland we are experiencing the first day of spring." My suggestion to change "won't" for "doesn't" is just a matter of preference.

Spring in Poland

Today in Poland we are experiencing the a first day of spring. :) The weather is great! It is warm (it's about 20 degrees) and very sunny! I hope that winter won't come back. I am very happy!! :))

"Today in Poland it is the first day of spring" is correct, but "Today in Poland we are experiencing the first day" is a more interesting experession and describes the feeling you are after in your paragraph.

I think "!" is better than "," after great because "The weather is great!" is an emphatic statement, and reads better than being listed with two factual statements by the coma. 

In this case, "it's" is not wrong. "It is" is just better for flow in my opinion.