Most establishments grant Casual Leave (CL), which can be utilized by recruits during the first year of their service. Earned Leave (EL)/Privilege Leave (PL)/Sick Leave (SL) is normally credited after the completion of one year of continuous service. Some offices may consider granting leave proportionately during the first year itself in 'emergency situations'.
However, first, you have to state clearly what provisions your "service conditions" cover, including your Terms & Conditions of appointment. Different provisions are applicable for different entities. Is it a factory, shop, bank, or what? Once you indicate this, it may be easier for us to relate to your case. Providing relevant details before placing your query is important. Off-the-cuff queries cannot evoke proper replies.