Calendar Lock 28 Regular icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 28 28" width="24" height="24"><path fill="currentColor" d="M21.75 3A3.25 3.25 0 0 1 25 6.25v8.812a4.02 4.02 0 0 0-1.5-1.527V9.503h-19V21.75c0 .966.784 1.75 1.75 1.75H15V25H6.25A3.25 3.25 0 0 1 3 21.75V6.25A3.25 3.25 0 0 1 6.25 3h15.5Zm0 1.5H6.25A1.75 1.75 0 0 0 4.5 6.25v1.753h19V6.25a1.75 1.75 0 0 0-1.75-1.75ZM18.5 18H18a2 2 0 0 0-2 2v5a2 2 0 0 0 2 2h7a2 2 0 0 0 2-2v-5a2 2 0 0 0-2-2h-.5v-1a3 3 0 1 0-6 0v1Zm1.5-1a1.5 1.5 0 0 1 3 0v1h-3v-1Zm3 5.5a1.5 1.5 0 1 1-3 0a1.5 1.5 0 0 1 3 0Z"/></svg>