Dought & clear - When does Taraaweeh prayer start in Ramadaan – on the first night or the second?.

When should we start topray Taraaweeh prayer, on the night of the
first day of Ramadaan (whenthe moon is sighted or the previous month
is completed) or after 'Isha' prayer on the first day of Ramadaan?.
Praise be to Allaah.
It is prescribed for the Muslim to perform Taraaweeh prayer after
'Isha' on the first night of Ramadaan, which is the night on which the
new moon is sighted or the Muslims complete thirty days of Sha'baan.
Similarly at the end of Ramadaan, Taraaweeh prayer should not be
offered if it is proven that the month has ended, either by sighting
of the new moon of Eid or if the month of thirty days has been
completed.
It is clear that Taraaweeh prayer is not connected to the fast during
the day in Ramadaan, rather it is connected to the onset of the month
at night in the beginning, and the last day of Ramadaan at the end.
We should not say that Taraaweeh prayer is a naafil prayer and it is
permissible to offer it onany night and in congregation, because
taraaweeh prayer is limited to the month of Ramadaan, and those who
offer this prayer are seeking the reward that comes for praying it.
The ruling on offeringthis prayer in congregation is different from
the rulingon offering other prayers in congregation.In Ramadaan it is
permissible to pray taraaweeh in congregation on each night, whilst
announcing it and encouraging others to join, unlike qiyaam at other
times, where praying qiyaam in congregation is not part of the Sunnah
unless it isdone without having theintention beforehand, orit is done
for the purpose of encouraging and teaching others. So it is Sunnah
to do it sometimes without committing to doing it all the time or
persisting in that.
Shaykh Muhammad al-Saalih al-'Uthaymeen (may Allaah have mercy on him) said:
Taraaweeh at times other than Ramadaan is an innovation (bid'ah). For
example, if the people wanted to gatherto pray qiyaam in congregation
in the mosque at times other than Ramadaan, this would be an
innovation.
There is nothing wrong with a person praying incongregation in his
house occasionally at times other than Ramadaan, because this is what
the Prophet (peace and blessings of Allaah be upon him) did. Once he
led Ibn 'Abbaas, and once Ibn Mas'ood and once Hudhayfah ibn
al-Yamaan, in prayer in his house, but he did notadopt that as a
regular Sunnah and he did not do that in the mosque.
Al-Sharh al-Mumti', 4/60, 61
Based on this, whoever offers Taraaweeh prayers before it is proven
that Ramadaan has begun is like one who offers a prayer at the wrong
time. No reward will be written for him, even if he is freeof the sin
of doing that deliberately.
And Allaah knows best.