I have sold land and earned capital gains. Whether I have to mention the date and sale of such land sold in the ITR forms?

Capital gains reporting requires furnishing dates of purchase and sale for land or building in income-tax returns.

When income from the transfer of land or a building is taxable under the head of Capital Gains, the income-tax return must include the date of purchase and the date of sale of the asset; furnishing both acquisition and transfer dates is mandatory where the transfer generates taxable capital gains.