List months = ["Enero", "Febrero", "Marzo", "Abril", "Mayo", "Junio", 
                "Julio", "Agosto", "Septiembre", "Octubre", "Noviembre", "Diciembre"]
def today = Date.parse("dd-MM-yyyy", "3-11-2020")
def clonedDate = today.clone()
def yesterday = today - 1
def tomorrow = today + 1

clonedDate++

assert clonedDate == tomorrow

clonedDate--
assert clonedDate == today

assert today.after(yesterday)
assert today.before(tomorrow)

assert today[Calendar.YEAR] == 2020
assert today[Calendar.MONTH] == 10
assert today[Calendar.DATE] == 3

println """
Yesterday: $yesterday
Today:     $today
Tomorrow:  $tomorrow
"""

println "Hoy es ${today[Calendar.DATE]} de ${months[today[Calendar.MONTH]]} de ${today[Calendar.YEAR]}"


String dateFormat = "dd/MM/yyyy"

println """
Day before: ${yesterday.format(dateFormat)}
Initial:    ${today.format(dateFormat)}
Day after:  ${tomorrow.format(dateFormat)}
"""