This will be useful for those that want to write custom code for getting the current date and time in the timezone set in WP settings, checking user-input time against the current time to determine if that was in the past or in the future etc.
What's covered:
Timezone string
Timezone of the site as a DateTimeZone object
Current time as Unix timestamp
Current time as a Date and time object (instance of DateTimeImmutable class) using the site's timezone
Current date and time in the specified format taking into account the site's timezone setting
Time since the current post was published in human-readable format
Date and Time Comparison
Timezone string
Might return Region/Location string or ±NN:NN offset.
