Awal bulan September 1980 (Masehi) bertepatan dengan tanggal 20 Syawal 1400 (Hijriyah), 20 Sawal 1912 (Jawa), 15s Badra 1915 (Candra), dan 10 Kasalapan 1902 (Surya). Sedangkan akhir bulan September 1980 (Masehi) bertepatan dengan tanggal 20 Dzulqo'dah 1400 (Hijriyah), 20 Sela 1912 (Jawa), 14s Asuji 1915 (Candra), dan 9 Kadasa 1902 (Surya).
| 20 Syawal 1400 | Hijriyah | 20 Dzulqo'dah 1400 | | 20 Sawal 1912 | Jawa | 20 Sela 1912 | | 15s Badra 1915 | Candra | 14s Asuji 1915 | | 10 Kasalapan 1902 | Surya | 9 Kadasa 1902 | |
| Ahad | Senin | Selasa | Rabu | Kamis | Jumat | Sabtu | | | | 15s | 10 | | Pahing | | | | Kliwon | | ٢٠ | 20 | | | | | | | 5k | 15 | | Pahing | | | | Kliwon | | ٢٥ | 25 | | | | | | | | | | | | | | | | | | | 5s | 30 | | Pahing | | | | Kliwon | | ١١ | 11 | | | | | | | 10s | 5 | | Pahing | | | | Kliwon | | ١٦ | 16 | | | | | | | | 15s | 10 | | Pahing | | | | Kliwon | | ٢١ | 21 | | | | | |
| Masehi | Hijriyah |
| Tanggal | Tanggal | Peringatan |
| 1 September 1980 | 20 Syawal 1400 | |
| 2 September 1980 | 21 Syawal 1400 | |
| 3 September 1980 | 22 Syawal 1400 | |
| 4 September 1980 | 23 Syawal 1400 | |
| 5 September 1980 | 24 Syawal 1400 | |
| 6 September 1980 | 25 Syawal 1400 | |
| 7 September 1980 | 26 Syawal 1400 | |
| 8 September 1980 | 27 Syawal 1400 | |
| 9 September 1980 | 28 Syawal 1400 | |
| 10 September 1980 | 29 Syawal 1400 | |
| 11 September 1980 | 1 Dzulqo'dah 1400 | |
| 12 September 1980 | 2 Dzulqo'dah 1400 | |
| 13 September 1980 | 3 Dzulqo'dah 1400 | |
| 14 September 1980 | 4 Dzulqo'dah 1400 | |
| 15 September 1980 | 5 Dzulqo'dah 1400 | |
| 16 September 1980 | 6 Dzulqo'dah 1400 | |
| 17 September 1980 | 7 Dzulqo'dah 1400 | |
| 18 September 1980 | 8 Dzulqo'dah 1400 | |
| 19 September 1980 | 9 Dzulqo'dah 1400 | |
| 20 September 1980 | 10 Dzulqo'dah 1400 | |
| 21 September 1980 | 11 Dzulqo'dah 1400 | |
| 22 September 1980 | 12 Dzulqo'dah 1400 | |
| 23 September 1980 | 13 Dzulqo'dah 1400 | Puasa Ayyamul Baidl |
| 24 September 1980 | 14 Dzulqo'dah 1400 | Puasa Ayyamul Baidl |
| 25 September 1980 | 15 Dzulqo'dah 1400 | Puasa Ayyamul Baidl |
| 26 September 1980 | 16 Dzulqo'dah 1400 | |
| 27 September 1980 | 17 Dzulqo'dah 1400 | |
| 28 September 1980 | 18 Dzulqo'dah 1400 | |
| 29 September 1980 | 19 Dzulqo'dah 1400 | |
| 30 September 1980 | 20 Dzulqo'dah 1400 | |
| Masehi | Jawa |
| Tanggal | Tanggal | Pasaran | Mongso | Wuku | Tahun | Windu | Lambang | Neptu |
| 1 September 1980 | 20 Sawal 1912 | Kliwon | 7 Katelu | Waye | Ba' | Kuntara | Langkir | Senin (4) + Kliwon (8) = 12 |
| 2 September 1980 | 21 Sawal 1912 | Legi | 8 Katelu | Waye | Ba' | Kuntara | Langkir | Selasa (3) + Legi (5) = 8 |
| 3 September 1980 | 22 Sawal 1912 | Pahing | 9 Katelu | Waye | Ba' | Kuntara | Langkir | Rabu (7) + Pahing (9) = 16 |
| 4 September 1980 | 23 Sawal 1912 | Pon | 10 Katelu | Waye | Ba' | Kuntara | Langkir | Kamis (8) + Pon (7) = 15 |
| 5 September 1980 | 24 Sawal 1912 | Wage | 11 Katelu | Waye | Ba' | Kuntara | Langkir | Jumat (6) + Wage (4) = 10 |
| 6 September 1980 | 25 Sawal 1912 | Kliwon | 12 Katelu | Waye | Ba' | Kuntara | Langkir | Sabtu (9) + Kliwon (8) = 17 |
| 7 September 1980 | 26 Sawal 1912 | Legi | 13 Katelu | Menahil | Ba' | Kuntara | Langkir | Ahad (5) + Legi (5) = 10 |
| 8 September 1980 | 27 Sawal 1912 | Pahing | 14 Katelu | Menahil | Ba' | Kuntara | Langkir | Senin (4) + Pahing (9) = 13 |
| 9 September 1980 | 28 Sawal 1912 | Pon | 15 Katelu | Menahil | Ba' | Kuntara | Langkir | Selasa (3) + Pon (7) = 10 |
| 10 September 1980 | 29 Sawal 1912 | Wage | 16 Katelu | Menahil | Ba' | Kuntara | Langkir | Rabu (7) + Wage (4) = 11 |
| 11 September 1980 | 1 Sela 1912 | Kliwon | 17 Katelu | Menahil | Ba' | Kuntara | Langkir | Kamis (8) + Kliwon (8) = 16 |
| 12 September 1980 | 2 Sela 1912 | Legi | 18 Katelu | Menahil | Ba' | Kuntara | Langkir | Jumat (6) + Legi (5) = 11 |
| 13 September 1980 | 3 Sela 1912 | Pahing | 19 Katelu | Menahil | Ba' | Kuntara | Langkir | Sabtu (9) + Pahing (9) = 18 |
| 14 September 1980 | 4 Sela 1912 | Pon | 20 Katelu | Prangbakat | Ba' | Kuntara | Langkir | Ahad (5) + Pon (7) = 12 |
| 15 September 1980 | 5 Sela 1912 | Wage | 21 Katelu | Prangbakat | Ba' | Kuntara | Langkir | Senin (4) + Wage (4) = 8 |
| 16 September 1980 | 6 Sela 1912 | Kliwon | 22 Katelu | Prangbakat | Ba' | Kuntara | Langkir | Selasa (3) + Kliwon (8) = 11 |
| 17 September 1980 | 7 Sela 1912 | Legi | 23 Katelu | Prangbakat | Ba' | Kuntara | Langkir | Rabu (7) + Legi (5) = 12 |
| 18 September 1980 | 8 Sela 1912 | Pahing | 24 Katelu | Prangbakat | Ba' | Kuntara | Langkir | Kamis (8) + Pahing (9) = 17 |
| 19 September 1980 | 9 Sela 1912 | Pon | 1 Kapat | Prangbakat | Ba' | Kuntara | Langkir | Jumat (6) + Pon (7) = 13 |
| 20 September 1980 | 10 Sela 1912 | Wage | 2 Kapat | Prangbakat | Ba' | Kuntara | Langkir | Sabtu (9) + Wage (4) = 13 |
| 21 September 1980 | 11 Sela 1912 | Kliwon | 3 Kapat | Bolo | Ba' | Kuntara | Langkir | Ahad (5) + Kliwon (8) = 13 |
| 22 September 1980 | 12 Sela 1912 | Legi | 4 Kapat | Bolo | Ba' | Kuntara | Langkir | Senin (4) + Legi (5) = 9 |
| 23 September 1980 | 13 Sela 1912 | Pahing | 5 Kapat | Bolo | Ba' | Kuntara | Langkir | Selasa (3) + Pahing (9) = 12 |
| 24 September 1980 | 14 Sela 1912 | Pon | 6 Kapat | Bolo | Ba' | Kuntara | Langkir | Rabu (7) + Pon (7) = 14 |
| 25 September 1980 | 15 Sela 1912 | Wage | 7 Kapat | Bolo | Ba' | Kuntara | Langkir | Kamis (8) + Wage (4) = 12 |
| 26 September 1980 | 16 Sela 1912 | Kliwon | 8 Kapat | Bolo | Ba' | Kuntara | Langkir | Jumat (6) + Kliwon (8) = 14 |
| 27 September 1980 | 17 Sela 1912 | Legi | 9 Kapat | Bolo | Ba' | Kuntara | Langkir | Sabtu (9) + Legi (5) = 14 |
| 28 September 1980 | 18 Sela 1912 | Pahing | 10 Kapat | Wugu | Ba' | Kuntara | Langkir | Ahad (5) + Pahing (9) = 14 |
| 29 September 1980 | 19 Sela 1912 | Pon | 11 Kapat | Wugu | Ba' | Kuntara | Langkir | Senin (4) + Pon (7) = 11 |
| 30 September 1980 | 20 Sela 1912 | Wage | 12 Kapat | Wugu | Ba' | Kuntara | Langkir | Selasa (3) + Wage (4) = 7 |
| Masehi | Sunda |
| Tanggal | Candra | Surya | Pasaran | Wuku | Tahun | Windu |
| 1 September 1980 | 15s Badra 1915 | 10 Kasalapan 1902 | Pahing | Landep | Hurang | Sancaya |
| 2 September 1980 | 1k Badra 1915 | 11 Kasalapan 1902 | Pon | Landep | Hurang | Sancaya |
| 3 September 1980 | 2k Badra 1915 | 12 Kasalapan 1902 | Wage | Landep | Hurang | Sancaya |
| 4 September 1980 | 3k Badra 1915 | 13 Kasalapan 1902 | Kaliwon | Landep | Hurang | Sancaya |
| 5 September 1980 | 4k Badra 1915 | 14 Kasalapan 1902 | Manis | Landep | Hurang | Sancaya |
| 6 September 1980 | 5k Badra 1915 | 15 Kasalapan 1902 | Pahing | Landep | Hurang | Sancaya |
| 7 September 1980 | 6k Badra 1915 | 16 Kasalapan 1902 | Pon | Wukir | Hurang | Sancaya |
| 8 September 1980 | 7k Badra 1915 | 17 Kasalapan 1902 | Wage | Wukir | Hurang | Sancaya |
| 9 September 1980 | 8k Badra 1915 | 18 Kasalapan 1902 | Kaliwon | Wukir | Hurang | Sancaya |
| 10 September 1980 | 9k Badra 1915 | 19 Kasalapan 1902 | Manis | Wukir | Hurang | Sancaya |
| 11 September 1980 | 10k Badra 1915 | 20 Kasalapan 1902 | Pahing | Wukir | Hurang | Sancaya |
| 12 September 1980 | 11k Badra 1915 | 21 Kasalapan 1902 | Pon | Wukir | Hurang | Sancaya |
| 13 September 1980 | 12k Badra 1915 | 22 Kasalapan 1902 | Wage | Wukir | Hurang | Sancaya |
| 14 September 1980 | 13k Badra 1915 | 23 Kasalapan 1902 | Kaliwon | Kurantil | Hurang | Sancaya |
| 15 September 1980 | 14k Badra 1915 | 24 Kasalapan 1902 | Manis | Kurantil | Hurang | Sancaya |
| 16 September 1980 | 15k Badra 1915 | 25 Kasalapan 1902 | Pahing | Kurantil | Hurang | Sancaya |
| 17 September 1980 | 1s Asuji 1915 | 26 Kasalapan 1902 | Pon | Kurantil | Hurang | Sancaya |
| 18 September 1980 | 2s Asuji 1915 | 27 Kasalapan 1902 | Wage | Kurantil | Hurang | Sancaya |
| 19 September 1980 | 3s Asuji 1915 | 28 Kasalapan 1902 | Kaliwon | Kurantil | Hurang | Sancaya |
| 20 September 1980 | 4s Asuji 1915 | 29 Kasalapan 1902 | Manis | Kurantil | Hurang | Sancaya |
| 21 September 1980 | 5s Asuji 1915 | 30 Kasalapan 1902 | Pahing | Tolu | Hurang | Sancaya |
| 22 September 1980 | 6s Asuji 1915 | 1 Kadasa 1902 | Pon | Tolu | Hurang | Sancaya |
| 23 September 1980 | 7s Asuji 1915 | 2 Kadasa 1902 | Wage | Tolu | Hurang | Sancaya |
| 24 September 1980 | 8s Asuji 1915 | 3 Kadasa 1902 | Kaliwon | Tolu | Hurang | Sancaya |
| 25 September 1980 | 9s Asuji 1915 | 4 Kadasa 1902 | Manis | Tolu | Hurang | Sancaya |
| 26 September 1980 | 10s Asuji 1915 | 5 Kadasa 1902 | Pahing | Tolu | Hurang | Sancaya |
| 27 September 1980 | 11s Asuji 1915 | 6 Kadasa 1902 | Pon | Tolu | Hurang | Sancaya |
| 28 September 1980 | 12s Asuji 1915 | 7 Kadasa 1902 | Wage | Gumbreg | Hurang | Sancaya |
| 29 September 1980 | 13s Asuji 1915 | 8 Kadasa 1902 | Kaliwon | Gumbreg | Hurang | Sancaya |
| 30 September 1980 | 14s Asuji 1915 | 9 Kadasa 1902 | Manis | Gumbreg | Hurang | Sancaya |
