‘7. An application for correction of the date of birth [by a public servant cannot be entertained at the fag end of his service]. It need not be pointed out that any such direction for correction of the date of birth of the public servant concerned has a chain reaction, inasmuch as others waiting for years, below him for their respective promotions are affected in this process. Some are likely to suffer irreparable injury, inasmuch as, because of the correction of the date of birth, the officer concerned, continues in office, in some cases for years, within which time many officers who are below him in seniority waiting for their promotion, may lose their promotions forever. … According to us, this is an important aspect, which cannot be lost sight of by the court or the tribunal while examining the grievance of a public servant in respect of correction of his date