[1] 
[[浮動時]]

[2] 
[[月日]]

[3] [[日の時刻]], [[時刻形式]]

[5] [CITE@en[February 29th on unspecified year · Issue #20 · inukshuk/edtf.js · GitHub]], [TIME[2022-06-28T02:58:16.000Z]] <https://github.com/inukshuk/edtf.js/issues/20>

[6] こういうの [[EDTF]] に限らずどう扱うか悩ましい問題

[4] [[日時パターン]]も参照。