It is a fact that the sun rises in countries located in South-East Asia before the Islamic countries in the Middle-East and Africa. Consequently, the day of 'Eid al-Adha starts her before yours (in Egypt) and we perform the 'Eid prayer, say the takbirs (i.e. saying Allahu akbar) and slaughter the sacrificial animals approximately four hours before you. My question is, if we to slaughter on the day of 'Eid after performing the 'Eid prayer, will this sacrifice be slaughtered before its proper time or not? Is it permissible for us to slaughter the sacrificial animals immediately after performing the 'Eid prayer, or should we wait until you perform 'Eid prayer (in Egypt)?

It is permissible to slaughter the sacrificial animals immediately after 'Eid prayer in your locality, just as the same you break fasting after the sun set in your countries neither in Egypt nor Saudi Arabia nor others; you perform al Fajr prayer when the day breaks at your countries and never wait for others and so forth.

Allah Most High knows best.