SHAFAQNA – The Grand Ayatollah Sistani answered questions about Lailat-ul-Qadr.
Question: Considering that the date of Lailat-ul-Qadr is different in Iran with other countries, is the real one in Iran or in other countries? Is there a different date for Lailat-ul-Qadr in every country?
The Grand Ayatollah Sistani: Each one (country) act on their (religious) duties based on proof (of the start of the month) by sighting the moon according to the religious methods in that country.
Source: PERSIAN SHAFAQNA