The first two kanji are inverted:

• 日本 (nihon) = Japan, the country
• 本日 (honjitsu) = today (formal), similar to 🇫🇷 aujourd’hui and 🇧🇷 no dia de hoje

The correct should have been:

• 本日は終了しました (honjitsu wa shuuryou shimashita), “today is over”