Though the one thing is clear that the Sandwiched leave is generally been taken into account but the more genuine view being that if the employee works in shift, covering 24 hrs then it is likely to burden the company by way of over time payment to the other employee. here it is legitimate to count the intervening Sunday as the leave, but if the employee works in day shift with Sunday as mandatory holiday in that case we should take the leave as being bifurcated into two days leave of Saturday and Monday only. Counting Sunday as his leave period is gross injustice and not a healthy sign. so v should frame our policy in these lines.