Warning: package 'ggplot2' was built under R version 4.5.2Warning: package 'tibble' was built under R version 4.5.2Warning: package 'tidyr' was built under R version 4.5.2Warning: package 'readr' was built under R version 4.5.2Warning: package 'purrr' was built under R version 4.5.2Warning: package 'stringr' was built under R version 4.5.2Warning: package 'forcats' was built under R version 4.5.2Warning: package 'knitr' was built under R version 4.5.2| String | Meaning | Code | Output |
|---|---|---|---|
| <span style=" font-family: monospace; " >%a</span> | Day of the week, abbreviated (Mon-Sun) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%a")</span> | Thu |
| <span style=" font-family: monospace; " >%A</span> | Day of the week, full (Monday-Sunday | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%A")</span> | Thursday |
| <span style=" font-family: monospace; " >%w</span> | Day of the week, numeric, 0 = Sunday (0-6) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%w")</span> | 4 |
| <span style=" font-family: monospace; " >%e</span> | Day of month (1-31) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%e")</span> | 10 |
| <span style=" font-family: monospace; " >%d</span> | Day of month (01-31) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%d")</span> | 10 |
| <span style=" font-family: monospace; " >%m</span> | Month, numeric (01-12) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%m")</span> | 12 |
| <span style=" font-family: monospace; " >%b</span> | Month, abbreviated (Jan-Dec) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%b")</span> | Dec |
| <span style=" font-family: monospace; " >%B</span> | Month, full (January-December) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%B")</span> | December |
| <span style=" font-family: monospace; " >%y</span> | Year, without century (00-99) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%y")</span> | 20 |
| <span style=" font-family: monospace; " >%Y</span> | Year, with century (0000-9999) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%Y")</span> | 2020 |
| <span style=" font-family: monospace; " >%j</span> | Day of the Year (001-366) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%j")</span> | 345 |
| <span style=" font-family: monospace; " >%U</span> | Week of year, numeric, starting on Sunday (00-52) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%U")</span> | 49 |
| <span style=" font-family: monospace; " >%W</span> | Week of year, numeric, starting on Monday (00-52) | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%W")</span> | 49 |
| <span style=" font-family: monospace; " >%x</span> | Locale-specific date | <span style=" font-family: monospace; " >format.Date("2020-12-10", "%x")</span> | 2020-12-10 |
| String | Meaning | Code | Output |
|---|---|---|---|
| <span style=" font-family: monospace; " >%S</span> | Second (00-59) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%S")</span> | 10 |
| <span style=" font-family: monospace; " >%M</span> | Minute (00-59) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%M")</span> | 30 |
| <span style=" font-family: monospace; " >%l</span> | Hour, in 12-hour clock (1-12) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%l")</span> | 3 |
| <span style=" font-family: monospace; " >%I</span> | Hour, in 12-hour clock (01-12) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%I")</span> | 03 |
| <span style=" font-family: monospace; " >%p</span> | am/pm | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%p")</span> | PM |
| <span style=" font-family: monospace; " >%H</span> | Hour, in 24-hour clock (00-23) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%H")</span> | 15 |
| <span style=" font-family: monospace; " >%X</span> | Locale-specific time | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%X")</span> | 15:30:10 |
| <span style=" font-family: monospace; " >%c</span> | Locale-specific date and time | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%c")</span> | Thu Dec 10 15:30:10 2020 |
| <span style=" font-family: monospace; " >%z</span> | Offset from GMT | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%z")</span> | -0600 |
| <span style=" font-family: monospace; " >%Z</span> | Time zone (character) | <span style=" font-family: monospace; " >format.Date(as.POSIXct("2020-12-10 15:30:10", tz = "America/Chicago"), "%Z")</span> | CST |
The above example uses Central time and so I can use tz = America/Chicago; other timezone options can be found using the code below:
#check system time zone
Sys.timezone(location = TRUE)[1] "America/Chicago"#other time zone options (only show first 20)
OlsonNames()[1:20] [1] "Africa/Abidjan" "Africa/Accra" "Africa/Addis_Ababa"
[4] "Africa/Algiers" "Africa/Asmara" "Africa/Asmera"
[7] "Africa/Bamako" "Africa/Bangui" "Africa/Banjul"
[10] "Africa/Bissau" "Africa/Blantyre" "Africa/Brazzaville"
[13] "Africa/Bujumbura" "Africa/Cairo" "Africa/Casablanca"
[16] "Africa/Ceuta" "Africa/Conakry" "Africa/Dakar"
[19] "Africa/Dar_es_Salaam" "Africa/Djibouti"