# B.3. 日期時間慣用字

[Table B.1](https://www.postgresql.org/docs/current/datetime-keywords.html#DATETIME-MONTH-TABLE) shows the tokens that are recognized as names of months.

**Table B.1. 月份名稱**

| 月份        | 縮寫        |
| --------- | --------- |
| January   | Jan       |
| February  | Feb       |
| March     | Mar       |
| April     | Apr       |
| May       |           |
| June      | Jun       |
| July      | Jul       |
| August    | Aug       |
| September | Sep, Sept |
| October   | Oct       |
| November  | Nov       |
| December  | Dec       |

[Table B.2](https://www.postgresql.org/docs/current/datetime-keywords.html#DATETIME-DOW-TABLE) shows the tokens that are recognized as names of days of the week.

**Table B.2. 星期名稱**

| 星期        | 縮寫               |
| --------- | ---------------- |
| Sunday    | Sun              |
| Monday    | Mon              |
| Tuesday   | Tue, Tues        |
| Wednesday | Wed, Weds        |
| Thursday  | Thu, Thur, Thurs |
| Friday    | Fri              |
| Saturday  | Sat              |

[Table B.3](https://www.postgresql.org/docs/current/datetime-keywords.html#DATETIME-MOD-TABLE) shows the tokens that serve various modifier purposes.

**Table B.3. 日期/時間修飾字**

| 修飾字               | 說明                     |
| ----------------- | ---------------------- |
| `AM`              | 12:00 之前的時間            |
| `AT`              | 忽略                     |
| `JULIAN`,`JD`,`J` | 接下來的字串是 Julian Date 格式 |
| `ON`              | 忽略                     |
| `PM`              | 12:00 之後的時間            |
| `T`               | 接下來的字串是 time           |


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