@@ -1425,7 +1425,7 @@ public function subSeconds(int $value): static
14251425 }
14261426
14271427 /**
1428- * Resets the time to 00:00:00
1428+ * Sets the time to 00:00:00
14291429 *
14301430 * @return static
14311431 */
@@ -1435,17 +1435,23 @@ public function startOfDay(): static
14351435 }
14361436
14371437 /**
1438- * Resets the time to 23:59:59
1438+ * Sets the time to 23:59:59 or 23:59:59.999999
1439+ * if `$microseconds` is true.
14391440 *
1441+ * @param bool $microseconds Whether to set microseconds
14401442 * @return static
14411443 */
1442- public function endOfDay (): static
1444+ public function endOfDay (bool $ microseconds = false ): static
14431445 {
1446+ if ($ microseconds ) {
1447+ return $ this ->modify ('23:59:59.999999 ' );
1448+ }
1449+
14441450 return $ this ->modify ('23:59:59 ' );
14451451 }
14461452
14471453 /**
1448- * Resets the date to the first day of the month and the time to 00:00:00
1454+ * Sets the date to the first day of the month and the time to 00:00:00
14491455 *
14501456 * @return static
14511457 */
@@ -1455,7 +1461,7 @@ public function startOfMonth(): static
14551461 }
14561462
14571463 /**
1458- * Resets the date to end of the month and time to 23:59:59
1464+ * Sets the date to end of the month and time to 23:59:59
14591465 *
14601466 * @return static
14611467 */
@@ -1465,7 +1471,7 @@ public function endOfMonth(): static
14651471 }
14661472
14671473 /**
1468- * Resets the date to the first day of the year and the time to 00:00:00
1474+ * Sets the date to the first day of the year and the time to 00:00:00
14691475 *
14701476 * @return static
14711477 */
@@ -1475,7 +1481,7 @@ public function startOfYear(): static
14751481 }
14761482
14771483 /**
1478- * Resets the date to end of the year and time to 23:59:59
1484+ * Sets the date to end of the year and time to 23:59:59
14791485 *
14801486 * @return static
14811487 */
@@ -1485,7 +1491,7 @@ public function endOfYear(): static
14851491 }
14861492
14871493 /**
1488- * Resets the date to the first day of the decade and the time to 00:00:00
1494+ * Sets the date to the first day of the decade and the time to 00:00:00
14891495 *
14901496 * @return static
14911497 */
@@ -1497,7 +1503,7 @@ public function startOfDecade(): static
14971503 }
14981504
14991505 /**
1500- * Resets the date to end of the decade and time to 23:59:59
1506+ * Sets the date to end of the decade and time to 23:59:59
15011507 *
15021508 * @return static
15031509 */
@@ -1509,7 +1515,7 @@ public function endOfDecade(): static
15091515 }
15101516
15111517 /**
1512- * Resets the date to the first day of the century and the time to 00:00:00
1518+ * Sets the date to the first day of the century and the time to 00:00:00
15131519 *
15141520 * @return static
15151521 */
@@ -1523,7 +1529,7 @@ public function startOfCentury(): static
15231529 }
15241530
15251531 /**
1526- * Resets the date to end of the century and time to 23:59:59
1532+ * Sets the date to end of the century and time to 23:59:59
15271533 *
15281534 * @return static
15291535 */
@@ -1542,7 +1548,7 @@ public function endOfCentury(): static
15421548 }
15431549
15441550 /**
1545- * Resets the date to the first day of week (defined in $weekStartsAt) and the time to 00:00:00
1551+ * Sets the date to the first day of week (defined in $weekStartsAt) and the time to 00:00:00
15461552 *
15471553 * @return static
15481554 */
@@ -1557,7 +1563,7 @@ public function startOfWeek(): static
15571563 }
15581564
15591565 /**
1560- * Resets the date to end of week (defined in $weekEndsAt) and time to 23:59:59
1566+ * Sets the date to end of week (defined in $weekEndsAt) and time to 23:59:59
15611567 *
15621568 * @return static
15631569 */
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