Deprecated function: strtotime()

abhishek_gupta1 → made their first commit to this issue’s fork.

@SandeepSingh199, here is the changes for corresponding issue. Kindly please review the MR

Please add conditions on each strtotime function. after your patch merged, getting Deprecated function: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in Drupal\meet_on_time\Form\UserTimeSlotBooking->buildForm() (line 49 of modules/contrib/meet_on_time/src/Form/UserTimeSlotBooking.php).
Drupal\meet_on_time\Form\UserTimeSlotBooking->buildForm(Array, Object) Error.

@SandeepSingh199 , I have aadded new changes as per your comment. Please kindly review the MR