SimpleDateFormat is a class that was added to java.text package that can be used for formatting and parsing dates in a locale-sensitive way. Using this Class you can convert Date to String or String to Date.
In this article, we will list the most important String patterns that you should have handy and can use as a cheatsheet while doing Date formatting and parsing,
List of Java Simple Date Formats (Cheatsheet):
| Sr.No | Represents | Date & Time Format | Example Date | Result |
| 1 | date (0-31) | d | Aug 02 11:27:45 GMT 2022 | 2 |
| 2 | date (0-31) | d | Aug 18 11:27:45 GMT 2022 | 18 |
| 3 | date (00-31) | dd | Aug 02 11:27:45 GMT 2022 | 02 |
| 4 | date (00-31) | dd | Aug 18 11:27:45 GMT 2022 | 18 |
| 5 | month (1-12) | M | Aug 02 11:27:45 GMT 2022 | 08 |
| 6 | month (1-12) | M | Dec 02 11:27:45 GMT 2022 | 12 |
| 7 | month (01-12) | MM | Aug 02 11:27:45 GMT 2022 | 02 |
| 8 | month (01-12) | MM | Dec 02 11:27:45 GMT 2022 | 12 |
| 9 | month | MMM | Dec 02 11:27:45 GMT 2022 | Dec |
| 10 | month | MMMM | Dec 02 11:27:45 GMT 2022 | December |
| 11 | year | y | Dec 02 11:27:45 GMT 2001 | 2001 |
| 12 | year | y | Dec 02 11:27:45 GMT 2022 | 2022 |
| 13 | year | yy | Dec 02 11:27:45 GMT 2001 | 01 |
| 14 | year | yy | Dec 02 11:27:45 GMT 2022 | 22 |
| 15 | year | yy | Dec 02 11:27:45 GMT 1990 | 90 |
| 16 | year | yy | Dec 02 11:27:45 GMT 1890 | 90 |
| 17 | year | yyy | Dec 02 11:27:45 GMT 2001 | 2001 |
| 18 | year | yyy | Dec 02 11:27:45 GMT 2022 | 2022 |
| 19 | year | yyy | Dec 02 11:27:45 GMT 1990 | 1990 |
| 20 | year | yyy | Dec 02 11:27:45 GMT 1890 | 1890 |
| 21 | year | yyyy | Dec 02 11:27:45 GMT 2022 | 2022 |
| 22 | date & month | d-M | Jan 01 11:27:45 GMT 2022 | 1-1 |
| 23 | date & month | dd-M | Jan 01 11:27:45 GMT 2022 | 01-1 |
| 24 | date & month | dd-MM | Jan 13 11:27:45 GMT 2022 | 13-01 |
| 25 | month & date | MM-dd | Dec 02 11:27:45 GMT 2022 | 01-13 |
| 26 | month & year | M-yy | Jan 01 11:27:45 GMT 2022 | 1-22 |
| 27 | month & year | MM-yy | Jan 13 11:27:45 GMT 2022 | 01-22 |
| 28 | month & year | MM-yyyy | Jan 13 11:27:45 GMT 2022 | 01-2022 |
| 29 | year & month | yy-M | Jan 13 11:27:45 GMT 2022 | 22-1 |
| 30 | year & month | yy-MM | Jan 13 11:27:45 GMT 2022 | 22-01 |
| 31 | year & month | yyyy-MM | Jan 13 11:27:45 GMT 2022 | 2022-01 |
| 32 | date, month & year | d-M-y | Jan 01 11:27:45 GMT 2022 | 1-1-2022 |
| 33 | date, month & year | dd-MM-yy | Jan 13 11:27:45 GMT 2022 | 13-01-22 |
| 34 | date, month & year | dd-MM-yyyy | Jan 13 11:27:45 GMT 2022 | 13-01-2022 |
| 35 | month,day & year | MM-dd-yy | Jan 13 11:27:45 GMT 2022 | 01-13-22 |
| 36 | month,day & year | MM-dd-yyyy | Jan 13 11:27:45 GMT 2022 | 01-13-2022 |
| 37 | year,month & date | yyyy-MM-dd | Jan 13 11:27:45 GMT 2022 | 2022-01-13 |
| 38 | week of year (1-53) | w | Jan 01 05:30:00 GMT 2022 | 1 |
| 39 | week of year (01-53) | ww | May 01 05:30:00 GMT 2022 | 01 |
| 40 | week of year (0-99) | w | May 01 05:30:00 GMT 2022 | 19 |
| 41 | week of year (00-99) | ww | May 01 05:30:00 GMT 2022 | 19 |
| 42 | week of month (1-12) | W | May 14 05:30:00 GMT 2022 | 2 |
| 43 | week of month (01-12) | WW | May 14 05:30:00 GMT 2022 | 02 |
| 44 | day of week of month | F | May 14 05:30:00 GMT 2022 | 2 |
| 45 | day of week of month | FF | May 14 05:30:00 GMT 2022 | 02 |
| 46 | day name | E | May 14 05:30:00 GMT 2022 | Sat |
| 47 | day name | EEE | May 14 05:30:00 GMT 2022 | Sat |
| 48 | day name | EEEE | May 14 05:30:00 GMT 2022 | Saturday |
| 49 | day as number (1-7) | u | May 14 05:30:00 GMT 2022 | 3 |
| 50 | day as number (01-07) | uu | May 14 05:30:00 GMT 2022 | 03 |
| 51 | hour of day (0-23) | H | May 14 05:30:00 GMT 2022 | 5 |
| 52 | hour of day (00-23) | HH | May 14 05:30:00 GMT 2022 | 05 |
| 53 | hour of day (0-23) | H | May 14 13:30:00 GMT 2022 | 13 |
| 54 | hour of day (00-23) | HH | May 14 23:30:00 GMT 2022 | 23 |
| 55 | hour of day (1-24) | k | May 14 00:30:00 GMT 2022 | 24 |
| 56 | hour of day (1-24) | k | May 14 05:30:00 GMT 2022 | 5 |
| 57 | hour of day (1-24) | k | May 14 23:30:00 GMT 2022 | 23 |
| 58 | hour of day (1-24) | kk | May 14 00:30:00 GMT 2022 | 24 |
| 59 | hour of day (1-24) | kk | May 14 05:30:00 GMT 2022 | 05 |
| 60 | hour of day (1-24) | kk | May 14 17:30:00 GMT 2022 | 17 |
| 61 | hour of day am/pm (0-11) | K | May 14 05:30:00 GMT 2022 | 5 |
| 62 | hour of day am/pm (0-11) | K | May 14 15:30:00 GMT 2022 | 3 |
| 63 | hour of day am/pm (0-11) | K | May 14 23:30:00 GMT 2022 | 11 |
| 64 | hour of day am/pm (0-11) | KK | May 14 05:30:00 GMT 2022 | 05 |
| 65 | hour of day am/pm (0-11) | KK | May 14 15:30:00 GMT 2022 | 03 |
| 66 | hour of day am/pm (0-11) | KK | May 14 23:30:00 GMT 2022 | 11 |
| 67 | hour of day am/pm (1-12) | h | May 14 00:30:00 GMT 2022 | 12 |
| 68 | hour of day am/pm (1-12) | h | May 14 15:30:00 GMT 2022 | 3 |
| 69 | hour of day am/pm (1-12) | h | May 14 23:30:00 GMT 2022 | 11 |
| 70 | hour of day am/pm (1-12) | hh | May 14 15:30:00 GMT 2022 | 03 |
| 71 | minute of hour (0-59) | m | May 14 15:01:00 GMT 2022 | 1 |
| 72 | minute of hour (0-59) | m | May 14 15:30:00 GMT 2022 | 30 |
| 73 | minute of hour (00-59) | mm | May 14 15:00:00 GMT 2022 | 00 |
| 74 | minute of hour (00-59) | mm | May 14 15:09:00 GMT 2022 | 09 |
| 75 | minute of hour (00-59) | mm | May 14 15:45:00 GMT 2022 | 45 |
| 76 | second in minute (00-59) | s | May 14 15:45:00 GMT 2022 | 0 |
| 77 | second in minute (00-59) | s | May 14 15:45:07 GMT 2022 | 7 |
| 78 | second in minute (00-59) | ss | May 14 15:45:07 GMT 2022 | 07 |
| 79 | second in minute (00-59) | ss | May 14 15:45:00 GMT 2022 | 00 |
| 80 | millisecond (000-999) | S | May 14 15:45:21 GMT 2022 | 692 |
| 81 | am/pm | a | May 14 15:45:21 GMT 2022 | PM |
| 82 | am/pm | a | May 14 09:45:21 GMT 2022 | AM |
| 83 | era (AD/BC) | G | May 14 09:45:21 GMT 2022 | AD |
| 84 | time zone | z | May 14 09:45:21 GMT 2022 | GMT |
| 85 | time zone | z | May 14 01:24:21 CDT 2022 | CDT |
| 86 | time zone | Z | May 14 01:24:21 CDT 2022 | -0500 |
| 87 | time zone | X | May 14 01:24:21 CDT 2022 | -05 |
| 88 | time zone | XX | May 14 01:24:21 CDT 2022 | -0500 |
Java Date Formats
| Sr.No | Date & Time Pattern | Example |
|---|---|---|
| 1 | yyyy | 2022 |
| 2 | yyyy-MM | 2022-08 |
| 3 | dd-MM-yyyy | 23-08-2022 |
| 4 | MM-dd-yyyy | 08-23-2022 |
| 5 | M-d-yyyy | 8-23-2022 |
| 6 | dd-MM-yy | 23-08-22 |
| 7 | yyyy.MM.dd G 'at' HH:mm:ss z | 2022.08.23 AD at 11:12:15 CDT |
| 8 | EEE, MMM d, ''yy | Wed, Jul 4, '01 |
| 9 | h:mm a | 11:07 PM |
| 10 | yyyy-MM-dd'T'HH:mm:ss.SSSZ | 2022-08-22T11:12:26.213-0500 |
| 11 | yyyy-MM-dd'T'HH:mm:ss.SSSXXX | 2022-08-22T11:12:26.213-05:00 |
| 12 | YYYY-'W'ww-u | 2001-W27-3 |
| 13 | dd/MM/yyyy | 22/08/2022 |
| 14 | MM/dd/yyyy | 08/22/2022 |
| 15 | ddMMyyyy | 23082022 |
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