Hello Timo, 

There isn't an option to change the font weight of Amelia, but you can change it with adding custom CSS. Could you please tell me do you want to change the calendar dates font? 

Hello Timo, 

and Val, 

Please try adding this CSS for the dates: 

.c-day-content {font-size: 15px !important;}

I provided 15px as an example you can change it to whatever size you want. 

try this one for the font weight: 

#am-calendar-picker > div > div.c-day-content-wrapper > div > div {font-weight: bold !important;}

Fot the time slots 

span.el-radio-button__inner {
 font-size: large !important;
 font-weight: bold !important;}

Let me know if this helped.