I thnk you are trying to say "my day is very boring." There are several issues with the sentence, though. "Día" is a maculine word, even though it ends in an a, so it must be "el día". "Yo" means "I", so what you say would be "the day of I is very boring." You need to use the possessive form, or "mi". If you use the verb "ser" as you did, it implies your days are ALWAYS boring. You should use "estar" instead. Last, the Spanish word for "boring" is aburrido". So...the sentence should read "Mi día está muy aburrido."
You should also know that only dull people get bored. Do something interesting.
muy buena
Felíz Dia de la Amistad is Spanish for Happy Friendship Day.
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tamales
fue
"dÃa de la independencia" in Mexico means: independence day.
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It means "the day of the spring".
September 15.
"Dia de la Independencia"
Independence day