If I just make niyat of 10 days, but I know its 8 days, can I fast? I will be visiting our Master Imam Reza AS, for the last two days of Shahr Ramadan. It will be sad to miss fasting.

jab yaqeen hai ki 8 din to niyat se kya hoga? aap aisa kar sakte hain ki 8 din ziarat par rahen aur wapsi par 2 din watan na aakar kahin aur chale jaen