When Zia Ul Haq dissolved national assembly and removed the then prime minister of Pakistan____?

When Zia Ul Haq dissolved national assembly and removed the then prime minister of Pakistan____?

ضیاء الحق نے قومی اسمبلی تحلیل کر کے اس وقت کے وزیر اعظم پاکستان کو کب ہٹا دیا؟
Explanation

Zia Ul Haq dissolved the National Assembly and removed Prime Minister Muhammad Khan Junejo under article 58(2)b of the amended Constitution on 29 May 1988.