Answers for "carbon date return 11 months for whole year"

carbon last day of month in timestamp

// first day of month (2021-01-01 00:00:00)
Carbon::now()->firstOfMonth()->startOfDay()
 
// first day of month in timestamp (1609459200)
Carbon::now()->firstOfMonth()->startOfDay()->timestamp
 
// last day of month (2021-01-31 23:59:59)
Carbon::now()->lastOfMonth()->endOfDay()
 
// last day of month in timestamp (1640995199)
Carbon::now()->lastOfMonth()->endOfDay()->timestamp

carbon get month from date

$now = Carbon::now();
echo $now->year;
echo $now->month;
echo $now->weekOfYear;