#let today() = {
  let month = datetime.today().month();
  let day = datetime.today().day();
  let year = datetime.today().year();
  [#year 年 #month 月#day 日]
}

#let today_en() = {
  let month = (
    "January", "February", "March", "April", "May", "June", "July",
    "August", "September", "October", "November", "December",
  ).at(datetime.today().month() - 1);
  let day = datetime.today().day();
  let year = datetime.today().year();
  [#month #day, #year]
}
