Hi,
I was using jevents and i noticed that there was a problem with DST in a comparation , making non-DST dates vs DST dates events not appear, because it's not having the right "if condition" anwser (by 1 hour). i made a modification in components/com_jevents/libraries/jicaleventcalrepeat.php
and it started to work again.

 function eventOnDate($testDate, $multidayTreatment = 0)

	{

		

		if (!isset($this->_startday))

		{

			$this->_startday = JevDate::mktime(0, 0, 0, $this->mup(), $this->dup(), $this->yup());

			$this->_startday_plus1 = JevDate::mktime(0, 0, 0, $this->mup(), $this->dup()+1, $this->yup());

			$this->_endday = JevDate::mktime(0, 0, 0, $this->mdn(), $this->ddn(), $this->ydn());

			// if ends on midnight then testing day should ignore the second day since no one wants this event to show

			if ($this->hdn() + $this->mindn() + $this->sdn() == 0 && $this->_startday != $this->_endday)

			{

				$this->_endday = JevDate::mktime(0, 0, 0, $this->mdn(), $this->ddn()-1, $this->ydn());

			}



					//check both DST 

					$atual = $testDate;

					$atual_localtime = localtime($atual,true);

					$atual_horario_verao = $atual_localtime['tm_isdst'];

					$date_localtime = localtime($this->_startday,true);

					$date_horario_verao =  $date_localtime['tm_isdst'];

					//correct  the hours

						if($atual_horario_verao && !$date_horario_verao)

						{

							$this->_startday -= 3600;

							$this->_endday -= 3600;

						}

						else if(!$atual_horario_verao && $date_horario_verao)

						{

							$this->_startday += 3600;

							$this->_endday += 3600;

						}

						





		}

		if ($this->_startday <= $testDate && $this->_endday >= $testDate)

		{

			// if only show on first day

			if ($multidayTreatment == 2 && $testDate >= $this->_startday_plus1)

			{

				return false;

			}

			// don't show multiday suppressed events after the first day if multiday is not true

			if ($multidayTreatment == 0)

			{

				if (!$this->_multiday && $testDate >= $this->_startday_plus1)

				{

					return false;

				}

			}

			return true;

		}

		else

			return false;



	}