Yes, an invitation letter should include expected travel dates or at least a clear duration of stay in Pakistan.
Why travel dates matter
Including travel dates or a defined duration helps authorities understand the timeline of the visit. It shows that the trip is planned and aligns with the visa being requested.
Level of detail required
The dates do not need to be exact down to the day, but they should be reasonably specific. For example, stating a month and length of stay is often acceptable if exact flights are not yet booked.
Consistency with other documents
The duration mentioned in the letter should match other documents, such as visa application forms or travel itineraries. Consistency reduces the chance of delays or questions.
If plans change later, minor differences are usually acceptable, but the initial application should still present a clear and realistic timeframe.