hour_start: вчера, 07:30:00

hour_start=$(perl -MPOSIX=strftime -e 'print strftime("%F 07:30:00", localtime(time - 86400))')

hour_end: сегодня, 07:30:00

hour_end=$(perl -MPOSIX=strftime -e 'print strftime("%F 07:30:00", localtime(time))')

echo "$hour_start" # 2025-12-18 07:30:00
echo "$hour_end" # 2025-12-19 07:30:00

[file-name 000305_2025-12-19_00-03-17.txt]