bash date variable format
# Source: https://www.tutorialkart.com/bash-shell-scripting/bash-date-format-options-examples/
date '+<format-option><format-option> <format-option>'
# For example:
echo $(date '+%A')
date=$(date '+%A')
# Formats:
# date +%a Weekday Name of weekday in short (like Sun, Mon, Tue, Wed, Thu, Fri, Sat) Mon
# date +%A Weekday Name of weekday in full (like Sunday, Monday, Tuesday) Monday
# date +%b Month Name of Month in short (like Jan, Feb, Mar ) Jan
# date +%B Month Month name in full short (like January, February) January
# date +%d Day Day of month (e.g., 01) 04
# date +%D MM/DD/YY Current Date; shown in MM/DD/YY 02/18/18
# date +%F YYYY-MM-DD Date; shown in YYYY-MM-DD 2018-01-19
# date +%H Hour Hour in 24-hour clock format 18
# date +%I Hour Hour in 12-hour clock format 10
# date +%j Day Day of year (001..366) 152
# date +%m Month Number of month (01..12) (01 is January) 05
# date +%M Minutes Minutes (00..59) 52
# date +%S Seconds Seconds (00..59) 18
# date +%N Nanoseconds Nanoseconds (000000000..999999999) 300231695
# date +%T HH:MM:SS Time as HH:MM:SS (Hours in 24 Format) 18:55:42
# date +%u Day of Week Day of week (1..7); 1 is Monday 7
# date +%U Week Displays week number of year, with Sunday as first day of week (00..53) 23
# date +%Y Year Displays full year i.e. YYYY 2018
# date +%Z Timezone Time zone abbreviation (Ex: IST, GMT) IST
