They are travelling to a European country and there are 15 of them; should they pray Jumu ‘ah?

Question

Praise be to Allah.

Firstly:

In the answer to question number
111934, we have discussed the
ruling on travelling to non-Muslim countries for the purpose of tourism and
leisure.

Secondly:

If the traveller intends to stay in a place for more than
four days, then he comes under the same rulings as a resident, so he has to
offer the prayers in full from the moment he enters the city; he also has to
pray Jumu‘ah where the call for it is given.

Ibn Qudaamah (may Allah have mercy on him) said: The well
known view from Ahmad is that the period which makes it obligatory for the
traveller to offer prayers in full if he intends to stay there is whatever
is more than twenty-one prayers. This was narrated by al-Athram and
al-Marwadhi and others. And it was narrated from him that if he intends to
stay there for four days he should offer the prayers in full, and if he
intends to stay there for less than that, then he may shorten the prayers.
This is the view of Maalik, al-Shaafa‘i, and Abu Thawr.

End quote from al-Mughni (2/65)

In Fataawa al-Lajnah it says: Travel in which it is
prescribed to avail oneself of the concessions of travel is that which is
customarily regarded as travel, and the distance in question is
approximately 80 km. If a person is sure he will cover this distance or
more, then he may avail himself of the concessions of travel, such as wiping
over the socks for three days and nights, joining and shortening prayers,
and breaking the fast in Ramadan. If the traveller intends to stay in a
place for more than four days, then he should not avail himself of the
concessions of travel, but if he intends to stay for four days or less, then
he may avail himself of those concessions. If a traveller is staying in a
place and he does not know when he will finish his business and he has not
set a specific time for his stay, then he may avail himself of the
concessions of travel even if he stays there for a long time. There is no
differentiation between travel on land and travel by sea. End quote.

Thus it is known that you have to offer the prayers in full,
and it is not permissible for you to shorten them.

With regard to joining prayers, this is not limited to
travel; rather it is prescribed in other cases too, such as when it is
raining, if one is sick and in case of hardship. See the answer to question
number 39176.

The basic principle is that you should offer the prayers on
time, and if there is a reason that makes you join the prayers, then it is
permissible to join them.

Thirdly:

If there are no residents living in this city where you will
be staying for whom Jumu‘ah is obligatory, then you do not have to pray
Jumu‘ah.

See the answer to question number
11556.

If the traveller intends to stay for any length of time which
means that he is not permitted to shorten the prayers, then he has to pray
Jumu‘ah by joining others, not by setting up Jumu‘ah prayers himself. If
there are people living there for whom Jumu‘ah is obligatory, then this
traveller has to pray with them.

See al-Mughni, 3/218; al-Insaaf, 5/169

And Allah knows best.