Days that are especially beneficial for inner self improvement and all kinds of spiritual activities called Ekadasi (11th day of waning and waxing moon). In April it will happen on 3rd and 17th. To get the advantage of these days you could limit yourself in some material pleasure, spend less energy on bodily matters, do any kind of spiritual activity. Along with it is highly recommended to abstain from grains and beans in your food. Ekadasi days recipes are on our food page.
On April 15th is annual spiritual festival and it is advantageous to fast till sunset or exercise any type of lighter diet, that will free your time and energy for meditation, mantra or other uplifting activities.