The hadeeth about the Trumpet blast on the fifteenth day of Ramadan if it happens to be a Friday

Praise
be to Allah.

This
hadeeth is munkar (odd) and is not saheeh. It was not narrated via any
acceptable isnaad and it is not proven to be from the words of the Prophet
(blessings and peace of Allah be upon him). Reality also confirms that it is
false and is to be rejected. It has often happened in past years that the
fifteenth of Ramadan fell on a Friday (and none of these things happened),
hence the scholars ruled that this hadeeth is fabricated and false. 

Al-‘Aqeeli (may Allah have mercy on him) said: 

There
is no basis for this hadeeth in any hadeeth from a trustworthy narrator or
via any trustworthy isnaad.

End
quote from ad-Du‘afa’ al-Kabeer (3/52). 

Ibn
al-Jawzi (may Allah have mercy on him) said in a separate chapter that he
entitled Baab Zuhoor al-Ayaat fi ash-Shuhoor (The Emergence of Signs
in Different Months): This hadeeth is fabricated and falsely attributed to
the Messenger of Allah (blessings and peace of Allah be upon him).

End
quote from al-Mawdoo‘aat (3/191). 

Al-‘Allaamah Ibn al-Qayyim (may Allah have mercy on him) mentioned it in
al-Manaar al-Muneef (p. 98) among other unsound (non-saheeh) hadeeths
that speak of future events. He said: … such as the hadeeth which says that
in Ramadan there will be a tremor that will wake the one who is sleeping,
make the one who is standing sit down, and bring the young girls out of
their seclusion. In Shawwaal there will be trouble; in Dhu al-Qa‘dah the
tribes will become distinct from one another; in Dhu al-Hijjah there will be
bloodshed; and the hadeeth which says that in Ramadan, halfway through the
month on the night before Friday, seventy thousand will swoon and seventy
thousand will become deaf.

End
quote. 

Shaykh
al-Albaani (may Allah have mercy on him) said: 

It is
mawdoo‘ (fabricated). It was narrated by Nu‘aym ibn Hammaad in al-Fitan
(160/1) and via him by Abu ‘Abdullah al-Haakim (4/517-518); and by Abu Nu
‘aym in Akhbaar Asbahaan (2/199). He said: Ibn Wahb told us, from
Maslamah ibn ‘Ali, from Qataadah, from Ibn al-Musayyab, from Abu Hurayrah…
in a marfoo‘ report (i.e., attributed to the Prophet (blessings and peace of
Allah be upon him). 

Al-Haakim said: This hadeeth is ghareeb (strange) in its text. There is no
certainty concerning Maslamah and proof cannot be established on the basis
of his reports. 

Adh-Dhahabi said: I say: It is mawdoo‘ (fabricated); Maslamah is worthless
and his reports are to be rejected. 

This
hadeeth was also narrated with other isnaads, which were mentioned by
as-Suyooti in al-La’aali (2/387-388); all of them are faulty. Some of
them are lengthy and others are short. The longest of them is the hadeeth of
Ibn Mas‘ood – then Shaykh al-Albaani quoted another version of the hadeeth:
“In Ramadan there will be a sound.” They said: At the beginning of it or in
the middle of it or at the end of it? He said: “No; rather it will be in the
middle of Ramadan, if the night of the (fifteenth) is the night before
Friday. There will be a sound from heaven because of which seventy thousand
will swoon, seventy thousand will be struck dumb, seventy thousand will
become blind, and seventy thousand will become deaf.” They said: Who among
your ummah will be safe? He said: “Those who stay in their houses, seek
refuge with Allah by prostrating, and say takbeer magnifying Allah out loud.
Then it will be followed by another sound. The first sound will be the voice
of Jibreel and the second sound will be the voice of the Shaytaan. The sound
in Ramadan, the turmoil in Shawaal, the distinguishing of the tribes in Dhu
al-Qa‘dah, raids on the pilgrims in Dhu al-Hijjah. And in Muharram: what is
Muharram? The beginning of it is a calamity for my ummah and the end of it
is joy for my ummah. A riding camel that a believer could use to escape
turmoil will be better for him than fertile land and houses on that land
that could yield one hundred thousand.” – Then Shaykh al-Albaani (may Allah
have mercy on him) said: It is mawdoo‘ (fabricated). It was narrated by
at-Tabaraani in al-Mu‘jam al-Kabeer (18/332/853); via Ibn al-Jawzi in
al-Mawdoo‘aat (3/191), via ‘Abd al-Wahhaab ibn ad-Dahhaak: Ismaa‘eel
ibn ‘Ayyaash told us, from al-Awzaa‘i, from ‘Abdah ibn Abi Lubaabah, from
Fayrooz ad-Daylami, in a marfoo‘ report (i.e., attributed to the Prophet
(blessings and peace of Allah be upon him). Ibn al-Jawzi said: This hadeeth
is not saheeh. Al-‘Aqeeli said: ‘Abd al-Wahhaab is nothing. Ibn Hibbaan
said: He used to steal hadeeth; it is not permissible to quote him as
evidence. Ad-Daaraqutni said: His hadeeth is odd and, as for Ismaa‘eel, he
is da‘eef (weak). ‘Abdah did not see Fayrooz, and Fayrooz did not see the
Messenger of Allah (blessings and peace of Allah be upon him). End quote. 

As-Silsilah ad-Da‘eefah
(no. 6178 and 6179). 

Shaykh
‘Abd al-‘Azeez ibn Baaz (may Allah have mercy on him) said: 

I have
heard that some of the ignorant are distributing pamphlets including a
hadeeth that is falsely attributed to the Prophet (blessings and peace of
Allah be upon him); this false hadeeth includes the following:

it was
narrated that Ibn Mas‘ood said: The Messenger of Allah (blessings and peace
of Allah be upon him) said: “If there is a blast in Ramadan, there will be
turmoil in Shawwaal, and distinguishing of the tribes in Dhu al-Qa‘dah, and
blood will be shed in Dhu al-Hijjah, and what is Muharram? He will say it
three times, what a bad thing will happen then. The people will be killed in
it, in great numbers.” We said: What is the blast, O Messenger of Allah? He
said: This will happen halfway through Ramadan on the night before Friday.
There will be a tremor that will wake the one who is sleeping, make the one
who is standing sit down, and bring the young girls out of their seclusion,
on the night before Friday, in a year when there will be a lot of
earthquakes and severe cold. If that coincides with Ramadan of that year, on
the night before Friday, then when you have prayed Fajr on a Friday in the
middle of Ramadan, go into your houses and close your doors, and block up
your windows, and cover yourselves with blankets, and block your ears. Then
when you feel the blast, fall down in prostration to Allah and say: ‘Glory
be to the Most Holy, glory be to the Most Holy, our Lord the Most Holy,’ for
whoever does that will be saved and whoever does not do that will be
doomed.” 

There
is no sound basis for this hadeeth; rather it is false and fabricated. The
Muslims have seen many years in which the night before Friday fell in the
middle of Ramadan, but what is mentioned in this false report of the blast
and so on did not happen, praise be to Allah. Thus anyone who comes across
these words will know that it is not permissible to propagate this false
hadeeth. Rather that paper should be torn up and destroyed, and people
should be alerted to the fact that it is false. It is well-known that the
Muslim must fear Allah at all times and to beware of that which Allah has
forbidden until the end of his life, as Allah, may He be glorified, said to
His Prophet (blessings and peace of Allah be upon him): “And
worship your Lord until there comes unto you the certainty (i.e. death)”
[al-Hijr 15:99].
What is meant by “the certainty” is death. And Allah, may He be glorified,
says (interpretation of the meaning): “O you who believe!
Fear Allah (by doing all that He has ordered and by abstaining from all that
He has forbidden) as He should be feared. (Obey Him, be thankful to Him, and
remember Him always), and die not except in a state of Islam (as Muslims)
with complete submission to Allah”
[al-Baqarah 2:132].
And the Prophet (blessings and peace of Allah be upon him) said: “Fear Allah
wherever you are, and follow up a bad deed with a good deed to erase it, and
show a good attitude towards people.” 

The
verses and hadeeths that speak of the obligation to fear Allah, adhere to
the truth and beware of everything that Allah has forbidden at all times, in
Ramadan and otherwise, are many and well-known. May Allah help the Muslims
to do that which pleases Him, and may He grant them understanding of Islam,
and may He protect us and them from confusing turmoil and from the evils of
those who call to falsehood, for He is Munificent, Most Generous. May Allah
send blessings upon our Prophet Muhammad and his family and companions.

End
quote from Majmoo‘ Fataawa Ibn Baaz (26/339-341) 

And
Allah knows best.