Hy,

For the admission dates and specific details for the Diploma in Elementary Education (D.El.Ed) at Birosthali Teachers Training College, you would need to contact the institution directly. Their official website provides the contact details, including phone numbers and email addresses for queries related to admissions.

Since the exact admission deadline for 2023 isn't readily available online, I suggest contacting the institution for the most accurate and up-to-date information.