/**
 * Carbon example for january 2021 
 */

// 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 example for january 1, 2021 
 */

// start of day in date (2021-01-01 00:00:00)
Carbon::now()->startOfDay()
 
// start of day in timestamp (1609459200)
Carbon::now()->startOfDay()->timestamp
 
// end of day in date (2021-01-01 23:59:59)
Carbon::now()->endOfDay()
 
// end of day in timestamp (1609545599)
Carbon::now()->endOfDay()->timestamp