The HebCal diaspora holiday calendar lists Yom HaAliyah as the 7th of Cheshvan. As explained on the website:
Yom HaAliyah (Aliyah Day) (Hebrew: יום העליה) is an Israeli national holiday celebrated annually on the seventh of the Hebrew month of Cheshvan, to commemorate the historic events which happened on the tenth of the Hebrew month of Nisan (Hebrew: י’ ניסן).
This is incorrect. As is clearly stated in both of the references on that page (Am Yisrael Foundation and Wikipedia), the holiday is in fact 10 Nisan. Because of the proximity of Yom HaAliyah to Pesach, the Israel Ministry of Education sponsors Yom HaAliyah programs in schools on 7 Cheshvan.
Please change the date of Yom HaAliyah on the HebCal diaspora holiday calendar from 7 Cheshvan to 10 Nisan, and correct the holiday page on the website.
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