Prime

import "react-multi-date-picker/styles/layouts/prime.css"
.
.
.
<DatePicker
  className="rmdp-prime"
  showOtherDays
/>

Mobile

import "react-multi-date-picker/styles/layouts/mobile.css"
.
.
.
<DatePicker
  className="rmdp-mobile"
/>

Changing The Text Of The Action Buttons In Mobile Mode

import "react-multi-date-picker/styles/layouts/mobile.css"
.
.
.
<DatePicker
  className="rmdp-mobile"
  mobileLabels={{
    OK: "Accept",
    CANCEL: "Close",
  }}
/>

Custom Mobile Buttons

import "react-multi-date-picker/styles/layouts/mobile.css"
.
.
.

const [value, setValue] = useState();

return (
  <DatePicker
    className="rmdp-mobile"
    value={value}
    onChange={setValue}
    mobileButtons={[
      {
        label: "RESET",
        type: "button",
        className: "rmdp-button rmdp-action-button",
        onClick: () => setValue({}),
      },
    ]}
  />
)