The word "hoy" is an adverb.
/hoy/
The word "hoy" is used to refer to the current day, essentially meaning "today." It is frequently used in both written and oral contexts, being a common term in everyday conversations, announcements, and various forms of media.
"Hoy" is very common in the Spanish language and is predominantly used in oral speech, although it also appears frequently in written contexts.
Today is a good day to start a new project.
Tengo una reunión importante hoy.
I have an important meeting today.
Hoy voy a visitar a mis amigos.
The word "hoy" appears in several idiomatic expressions that convey specific meanings in different contexts. Here are a few:
As of today, telecommuting is more common than ever.
No dejes para mañana lo que puedes hacer hoy.
Don't put off until tomorrow what you can do today.
Hoy en día, la tecnología está en constante evolución.
The word "hoy" derives from the Latin "hodie," which also means "today." Over time, it has evolved in its form and pronunciation in the Spanish language while maintaining its original meaning.