My macOS version of Alexis Janvier's did shell script.

did.sh

export MDV_THEME=729.8953
export DID_PATH=~/.did


function did(){
    export LC_ALL=C
    mkdir -p ${DID_PATH}
    if [ ! -f ${DID_PATH}/$(date +%Y-%V).md ]; then
        echo -e "# Week $(date +"%V (%B %Y)") \n\n## $(date +"%A %d-%m-%y")" > ${DID_PATH}/$(date +%Y-%V).md
    fi
    FILE_EDITION_DATE="$(stat -f %Sm -t %d-%m-%Y ${DID_PATH}/$(date +%Y-%V).md)"
    NOW="$(date +"%d-%m-%Y")"
    if [ ${FILE_EDITION_DATE:0:10} != ${NOW} ]
    then
        echo -e "\n## $(date +"%A %d-%m-%Y")\n" >> ${DID_PATH}/$(date +%Y-%V).md
    fi
    unset LC_ALL
    vim +'normal Go' ${DID_PATH}/$(date +%Y-%V).md
}

function didv(){
    if [ $1 ]
    then
         mdv ${DID_PATH}/${1}.md
    else
        mkdir -p ${DID_PATH}
        if [ ! -f ${DID_PATH}/$(date +%Y-%V).md ]; then
            LC_ALL=C echo "# Week $(date +"%V (%B %Y)") \n\n## $(date +"%A %d-%m-%Y")" > ${DID_PATH}/$(date +%Y-%V).md
        fi
        mdv ${DID_PATH}/$(date +%Y-%V).md
    fi
}

function week2Month(){
    export LC_ALL=C
    year=$(echo $1 | cut -f1 -d-)
    week=$(echo $1 | cut -f2 -d-)
    local dayofweek=1 # 1 for monday
    date -j -f "%Y-%W" $1 +"%B %Y"     
    unset LC_ALL
    
}

function didl(){
    for file in `ls ${DID_PATH}/*.md | sort -Vr`; do
        filenameRaw="$(basename ${file})"
        filename="${filenameRaw%.*}"
        echo "${filename} ($(week2Month ${filename}))"
    done
}

function dids(){
    export LC_ALL=C
    if [ $1 ]
    then
        for file in `ls ${DID_PATH}/*.md | sort -Vr`; do
            NB_OCCURENCE="$(grep -c ${1} ${file})"
            if [ ${NB_OCCURENCE} != "0" ]
            then
                filenameRaw="$(basename ${file})"
                filename="${filenameRaw%.*}"
                echo -e "\n\033[32m=> ${filename} ($(week2Month ${filename}), ${NB_OCCURENCE} results) \033[0m" && grep -n -B 1 ${1} ${file}
            fi
        done
    else
         echo "You must add a something to search..."
    fi
    unset LC_ALL
}