Hi Praveen,
You can try following tricks -
1. Go to SE80, search for BSP Application = 'thtmlb_styles'
2. under Pages with Flow Logic - we have one CSS file called "thtmlb_core_stand.css"
3. In this file try changing width of method call ' #thtmlb-calendar-container ' to 150px like shown below.
#thtmlb-calendar-container {
display: none;
position: absolute;
width: 150px;
}
hope it helps.
Best Regards,
Sandeep Kumar B