| 1978/12/28(YY/MM/DD) WEEKNUMBER OF YEAR |
|
| A-TYPE ISO(janyary1) MONDAY START |
1978 week53 [12/25(MON)-12/31(SUN) |
| ★B-TYPE ISO(janyary4) ISO8601 STANDARD MONDAY START |
1978 week52 [12/25(MON)-12/31(SUN) |
| ★C-TYPE USA(january1) SUNDAY START |
1978 week52 [12/24(SUN)-12/30(SAT)] |
| D-TYPE USA(january4) SUNDAY START |
1978 week52 [12/24(SUN)-12/30(SAT)] |
| ★E-TYPE SAT(january1) SATURDAY START |
1978 week52 [12/23(SAT)-12/29(FRI) |
| 1978/12(USA) | |||||||
| SUN | MON | TUE | WED | THU | FRI | SAT | |
| ❶ | 1 | 2 | |||||
| ❷ | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| ❸ | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| ❹ | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| ❺ | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| ❻ | 31 | ||||||
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