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<?php $date1 = new DateTime('2017-03-01', new DateTimeZone('UTC')); $date2 = new DateTime('2017-04-01', new DateTimeZone('UTC')); $diff = $date1->diff($date2); echo "{$diff->m} months and {$diff->d} days.";
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.21, 8.3.0 - 8.3.9
1 months and 0 days.

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177.84 ms | 404 KiB | 174 Q