However, it's not a common phrase in Spanish. It's likely you're thinking of "mañana" which is a Spanish word meaning "tomorrow".
"Mañana" is often used in the phrase "mañana, mañana", which translates to "tomorrow, tomorrow" and implies procrastination or a casual attitude towards deadlines.
The saying "España mañana" is often used to refer to the perceived laid-back and relaxed attitude towards time in Spain. This is a stereotype that isn't necessarily true, but it's a common perception.
So, while "España mañana" isn't a true Spanish phrase, it's used to represent a certain cultural attitude.