when
This little script helps with Remind Calendars
#!/bin/bash
# This script creates a file called SolarDataReminders that contains precise times and dates
# for Perihelion, Equinox, Solstice, and Aphelion. It can be added to your ~/.reminders
# file, or included in a other ways.
# The list of sun positions below is from the Astronomical Applications
# Department of the U.S. Naval Observatory
# Widely speaking, it connects to their website over and over again, replacing ${Year} with
# each of a sequence of years between 2022 and 2100.
# The grep below then looks for the partial words helion quinox and olstice, but removes the
# line that also says 'Earth's Seasons'
# The sed script converts multiple spaces to singles, and removes leading and trailing space
# The result gets sent to a temporary file.
# Then, read in from that file, one line at a time, breaking the words of each line to get
# what Event, and the Year, Date, and Time, then convert the time from 6:10 to 6,10.
# Write the results out to a Remind statement in the form of;
# REM [trigger(date(2100,January,3), time(13,54), 1)] MSG Perihelion
# to a second file, do this in a loop for a years records, then delete the temporary file
# and add a blank line after the year's worth of events.
# Finaly, go back for the next year in the sequence.
# Love *nix!
Output=SolarDataReminders
File=$(mktemp)
for Year in $(seq 2022 2100)
do
links -dump "https://aa.usno.navy.mil/calculated/seasons?year=${Year}&tz=0&tz_sign=-1&tz_label=false&dst=false&submit=Get+Data" \
| grep -E 'helion|quinox|olstice' \
| grep -v "Earth's Seasons" \
| sed -e 's/ */ /g' -e 's/^ *\(.*\) *$/\1/' \
>> ${File}
while read Event Year Month Day Time
do Comdelimit=$(echo ${Time} | tr ":" ",")
echo "REM [trigger(date("${Year}","${Month}","${Day}"), time("${Comdelimit}"), 1)] MSG "${Event} ;
done < ${File} >> ${Output}
rm ${File}
echo >> ${Output}
done
when.txt · Last modified: by steve