panel-pelican-dev/database/migrations/2021_01_13_013420_add_cron_month.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

return new class extends Migration
{
    /**
     * Run the migrations.
     */
    public function up(): void
    {
        Schema::table('schedules', function (Blueprint $table) {
            $table->string('cron_month')->nullable()->after('cron_day_of_week');
        });
    }

    /**
     * Reverse the migrations.
     */
    public function down(): void
    {
        Schema::table('schedules', function (Blueprint $table) {
            $table->dropColumn('cron_month');
        });
    }
};