At the time of the commencement of the Indian Evidence Act, 1872, there is a British rule in India and as the English Law of Evidence was not suitable for Indian conditions, this Act was formed.
Judicial System in India was introduced by the Britishers and for deciding a matter/dispute and to pronounce a Judgment, it is necessary to enact the Law of Evidence, which was suitable to the Indian conditions.
For enacting the Law of Evidence Commissioners were appointed by the Government to prepare a substantive law of Evidence. Commissioners were made several recommendations and a draft bill of Evidence was prepared and referred to the Select Committee.
Select Committee presented the Evidence Bill to the Council of The Governor General of India along with its report on 31st March, 1871 and the Council of Governor General made the amendments as settled by the Select Committee.
Select Committee recommended to pass the Evidence Law with certain amendments in its report submitted on dated 30 January, 1872.
Hence the Evidence Bill was passed by the Legislature and received the assent of the Governor General on 15th March, 1872 and this Evidence Law came into force on 1st September, 1872.
The date of coming into force of the Evidence Act and the Indian Contract Act are same i.e. 1st September, 1872.