We see this is not a Shia fabrication, but also found in our Sunni brethren historic records and hadith. So how can our Sunni brethren fast on this day, as a day of happiness and congratulations, when the sky cried and mourned?
وقال علي بن محمد المدائني ، عن علي بن مدرك ، عن جده الأسود بن قيس : احمرت آفاق السماء بعد قتل الحسين بستة أشهر ، نرى ذلك في آفاق السماء كأنها الدم . قال : فحدثت بذلك شريكا ، فقال لي : ما أنت من الأسود ؟ ، قلت : هو جدي أبو أمي قال : أم والله إن كان لصدوق الحديث ، عظيم الأمانة ، مكرما للضيف.
“Ali bin Madrak” quotes from his grandfather “Aswad bin Qais” who said: after the martyrdom of imam “Husayn” [AS] the horizon was red until six months and we saw it like blood in sky, “Ali bin Muhammad Madaeni” asked him: what’s your relationship with “Aswad”: he said: he’s my maternal grandfather, “Ali bin Muhammad Madaeni” said: swear by god! he was honest, hospitable and great trustee.
“Al-Dhahabi” – Siyar al-A’lam al-Nubala – vol. 3, p 312
عن ابن سيرين قال لم تبك السماء على أحد بعد يحيى بن زكريا إلا على الحسين بن علي.
“Ibn Sirin” said: sky has cried for no one other than “Zachariah” and “Husayn bin Ali”.
“Al-Dhahabi” – Siyar al-A’lam al-Nubala – vol. 3, p 312
عَنْ نَضْرَةَ الْأَزْدِيَّةِ قَالَتْ : لَمَّا أَنْ قُتِلَ الْحُسَيْنُ بن علي (عليهما السلام) مَطَرَتِ السَّمَاءُ دَماً فَأَصْبَحْتُ وَ كُلُّ شَيْءٍ لَنَا مَلْآنُ دَما .
“Nazrah al-Azdiyyah” says: when “Husayn bin Ali” [AS] was martyred, sky cried blood and we’d see that all our things are covered with blood.
“Al-Mazi”- “Tahzib al-Kamal” – vol. 6, p 433
عن عيسى بن الحارث الكندي ، قال : لما قتل الحسين مكثنا سبعة أيام إذا صلينا فنظرنا إلى الشمس على أطراف الحيطان كأنها الملاحف المعصفرة ، ونظرنا إلى الكواكب يضرب بعضها بعضا.
“Isa bin Harith Kandi” says: when “Husayn bin Ali” [AS] was martyred, until seven days, whenever we said “Asr” prayer, we’d see that sunlight that hit the walls of our homes is so red as if they were covered with red tent and we’d see that some of stars beat each other. {bumped into each other}
“Al-Dhahabi” – Siyar al-A’lam al-Nubala – p 3, vol. 312