Why my account "went to sleep for the night"?
Gramista automates liking, following and unfollowing just like a human being would. People sleep at night, so Gramista needs to sleep so your activity appears as natural as possible. Sleep is built into the script and can't be changed. Sleeping helps to protect your account from too much activity, which can get you blocked temporarily.
Activity Timezone regulates at which points in time the script will be most active and when it'll go to sleep. Click the following link to learn how to set your timezone.