Smart remove has a problem around leap years (29th February)

Here is the problem (See image): Smart remove did not handle the data 2024-02-29. It has left many days from that month, when it was only meant to leave one day from that month.

mike@mike-desktop:~$ backintime --diagnostics
Gtk-Message: 08:37:35.697: Failed to load module "atk-bridge": 'gtk_module_display_init': /usr/lib/x86_64-linux-gnu/gtk-2.0/modules/libgail.so: undefined symbol: gtk_module_display_init
{
    "backintime": {
        "name": "Back In Time",
        "version": "1.4.3",
        "latest-config-version": 6,
        "local-config-file": "/home/UsernameReplaced/.config/backintime/config",
        "local-config-file-found": true,
        "global-config-file": "/etc/backintime/config",
        "global-config-file-found": false,
        "started-from": "/usr/share/backintime/common",
        "running-as-root": false,
        "user-callback": "/home/UsernameReplaced/.config/backintime/user-callback",
        "keyring-supported": true
    },
    "host-setup": {
        "platform": "Linux-6.8.0-44-generic-x86_64-with-glibc2.39",
        "system": "Linux #44-Ubuntu SMP PREEMPT_DYNAMIC Tue Aug 13 13:35:26 UTC 2024",
        "OS": {
            "/etc/os-release": "Ubuntu 24.04.1 LTS",
            "/etc/lsb-release": "DISTRIB_ID=Ubuntu\nDISTRIB_RELEASE=24.04\nDISTRIB_CODENAME=noble\nDISTRIB_DESCRIPTION=\"Ubuntu 24.04.1 LTS\"\n",
            "/etc/debian_version": "trixie/sid\n"
        },
        "display-system": "x11",
        "locale": "en_US, UTF-8",
        "PATH": "/home/UsernameReplaced/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin",
        "RSYNC_OLD_ARGS": "(not set)",
        "RSYNC_PROTECT_ARGS": "(not set)"
    },
    "python-setup": {
        "python": "3.12.3 main Jul 31 2024 17:43:48 CPython GCC 13.2.0",
        "python-executable": "/usr/bin/python3",
        "python-executable-symlink": true,
        "python-executable-resolved": "/usr/bin/python3.12",
        "sys.path": [
            "/usr/share/backintime/qt/plugins",
            "/usr/share/backintime/common/plugins",
            "/usr/share/backintime/plugins",
            "/usr/share/backintime/common",
            "/usr/lib/python312.zip",
            "/usr/lib/python3.12",
            "/usr/lib/python3.12/lib-dynload",
            "/usr/local/lib/python3.12/dist-packages",
            "/usr/lib/python3/dist-packages"
        ],
        "qt": {
            "Version": "PyQt 5.15.10 / Qt 5.15.13",
            "Theme": "Yaru-MATE-light",
            "Theme Search Paths": [
                "/home/UsernameReplaced/.icons",
                "/home/UsernameReplaced/.local/share/icons",
                "/usr/share/icons",
                "/var/lib/snapd/desktop/icons",
                ":/icons"
            ],
            "Fallback Theme": "mate",
            "Fallback Search Paths": []
        }
    },
    "external-programs": {
        "rsync": {
            "version": "3.2.7",
            "protocol": "31.0",
            "capabilities": {
                "file_bits": 64,
                "inum_bits": 64,
                "timestamp_bits": 64,
                "long_int_bits": 64,
                "socketpairs": true,
                "symlinks": true,
                "symtimes": true,
                "hardlinks": true,
                "hardlink_specials": true,
                "hardlink_symlinks": true,
                "IPv6": true,
                "atimes": true,
                "batchfiles": true,
                "inplace": true,
                "append": true,
                "ACLs": true,
                "xattrs": true,
                "secluded_args": "optional",
                "iconv": true,
                "prealloc": true,
                "stop_at": true,
                "crtimes": false
            },
            "optimizations": {
                "SIMD_roll": true,
                "asm_roll": false,
                "openssl_crypto": true,
                "asm_MD5": false
            },
            "checksum_list": [
                "xxh128",
                "xxh3",
                "xxh64",
                "md5",
                "md4",
                "sha1",
                "none"
            ],
            "compress_list": [
                "zstd",
                "lz4",
                "zlibx",
                "zlib",
                "none"
            ],
            "daemon_auth_list": [
                "sha512",
                "sha256",
                "sha1",
                "md5",
                "md4"
            ]
        },
        "ssh": "OpenSSH_9.6p1 Ubuntu-3ubuntu13.5, OpenSSL 3.0.13 30 Jan 2024",
        "sshfs": "(no sshfs)",
        "encfs": "(no encfs)",
        "shell": "/bin/bash",
        "shell-version": "GNU bash, version 5.2.21(1)-release (x86_64-pc-linux-gnu)"
    }
}
bit-team / backintime

Smart remove has a problem around leap years (29th February) #1874
