Fixed: calculation of julian day first of year when not exists it yea…

…r in list.

src/Calendars/ShiaCalendar.php

@@ -83,8 +83,8 @@ public function daysInMonth($year, $month)
  1440 => [30, 29, 30, 30, 30, 29, 29, 30, 29, 30, 29, 29],
  1441 => [29, 30, 29, 30, 30, 29, 30, 30, 29, 30, 29, 30],
  1442 => [29, 29, 30, 29, 30, 29, 30, 30, 29, 30, 30, 29],
- 1443 => [29, 30, 30, 29, 29, 30, 29, 30, 29, 30, 30, 29]
-
+ 1443 => [29, 30, 30, 29, 29, 30, 29, 30, 29, 30, 30, 29],
+ 1444 => [30, 30, 29, 30, 29, 29, 30, 30, 29, 30, 29, 30],
  ];
 
  if ($month < 1 || $month > 12) {
@@ -109,13 +109,26 @@ public function julianDayFirstOfYear($year)
  1440 => 2458372.5,
  1441 => 2458727.5,
  1442 => 2459082.5,
- 1443 => 2459436.5
+ 1443 => 2459436.5,
+ 1444 => 2459790.5,
  ];
 
  if (isset($julianDays[$year])) {
  return $julianDays[$year];
  }
- return $this->dateToJulianDay($year, 1, 1, 0, 0, 0);
+
+ $availYears = array_keys($julianDays);
+ $minYear = min($availYears);
+ $maxYear = max($availYears); 
+
+ if($year > $maxYear) {
+ $julianDay = $julianDays[$maxYear] + (($year - $maxYear) * Constants::DAYS_OF_SHIA_YEAR);
+ } 
+ else { // $year < $minYear
+ $julianDay = $julianDays[$minYear] - (($minYear - $year) * Constants::DAYS_OF_SHIA_YEAR);
+ }
+
+ return $julianDay;
  }
 
  public function isLeap($year)