To give us an idea of the overall feeling of your brand, let us know which styles you lean towards
Professional, simple, no elaborate logo icon. Can insert a simple online calendar symbol somewhere on the logo. Eg. of the symbol https://goo.gl/3PFJk8
I like a minimal design with as little details as possible yet conveying a suitable message. Eg. in the calendar symbol given above, you could show the 2 ring binders at the top but omit the little squares.