What is the timeframe for reciting takbīr of tashrīq?

It should be remembered that from the perspective of name, the days of Tashrīq are from 11^th Dhū al-Ḥijjah to the 13^th.

However, the command of reciting takbīrāt al-tashrīq is from the fajr of 9^th Dhū al-Ḥijja until the Ꜥaṣr of the 13^th. It is wājib to recite takbīr once in a loud voice after every farḍ prayer offered in congregation, whilst reciting it three times is superior. These are the takbīrāt al-tashrīq.

The wording of the takbīrāt al-tashrīq is as follows:

اَللہُ اَکْبَرُ اَللہ ُ اَکْبَرُ  لَآ اِلٰہَ اِلَّا اللہُ وَاللہُ اَکْبَرُ  اَللہُ اَ کْبَرُ وَلِلّٰہِ الْحَمْد

It is wājib to recite the takbīr immediately after finishing salah with salam. It is wājib upon the latecomer who joins the congregation late and must make up some units, to recite the takbīr after making up the missed units and making the concluding salām.^[1]

What is the takbīr of tashrīq?

Mufti Aḥmad Yār Khān al-Naʿīmī رَحْمَةُ الـلّٰـهِ عَـلَيْه explains:

The takbīr of tashrīq is an amalgamation of statements said by Prophet Ibrāhīm عَـلَيْـهِ الـسَّـلاَم, Prophet Ismāʿīl عَـلَيْـهِ الـسَّـلاَم, and the Archangel Jibrīl عَـلَيْـهِ الـسَّـلاَم.

When Prophet Ibrāhīm عَـلَيْـهِ الـسَّـلاَم placed a knife on the throat of Prophet Ismāʿīl عَـلَيْـهِ الـسَّـلاَم to sacrifice him, Allah Almighty ordered Jibrīl عَـلَيْـهِ الـسَّـلاَم to bring a ram from Paradise to Earth. When doing this, Jibrīl عَـلَيْـهِ الـسَّـلاَم exclaimed:اَللہُ اَکْبَرُ اَللہ ُ اَکْبَر . Prophet Ibrāhīm عَـلَيْـهِ الـسَّـلاَم looked upwards when hearing this, saw Jibrīl عَـلَيْـهِ الـسَّـلاَم bringing the ram, and said: لَآ اِلٰہَ اِلَّا اللہُ     وَاللہُ اَکْبَر .