Simple Time Period Helper

time_period.php

<?php

if (! function_exists('time_period')) {
    function time_period()
    {
        // Morning: 6 a.m.-noon
        // Afternoon: noon-6 p.m.
        // Evening: 6-9 p.m.

        $value = (int) date('H');

        if (in_array($value, range(0, 12))) {
            return __('Morning');
        }

        if (in_array($value, range(13, 15))) {
            return __('Afternoon');
        }

        if (in_array($value, range(16, 23))) {
            return __('Evening');
        }
    }
}

Reference: https://wgntv.com/weather/how-do-you-define-daytime-and-evening-times-in-a-weather-forecast/