import java.time.{LocalDate, YearMonth, DayOfWeek}
import java.time.format.TextStyle
import java.util.Locale
object CalendarPrinter:
def printMonth(year: Int, month: Int): Unit =
val ym = YearMonth.of(year, month)
val first = ym.atDay(1)
val daysInMonth = ym.lengthOfMonth()
val monthName = ym.getMonth.getDisplayName(TextStyle.FULL, Locale.getDefault)
println(s" $monthName $year")
println("Su Mo Tu We Th Fr Sa")
// DayOfWeek: Monday=1 ... Sunday=7
val offset = first.getDayOfWeek.getValue % 7 // convert Sunday→0
print(" " * offset)
for day <- 1 to daysInMonth do
print(f"$day%2d ")
if ((offset + day) % 7 == 0) then println()
println()
@main def run(): Unit =
printMonth(2026, 1)
/*
run:
January 2026
Su Mo Tu We Th Fr Sa
1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
*/
